检索结果-南通市图书馆

Spinal Analgesia with Intrathecal Morphine versus Conventional Analgesia after Laparoscopic Colectomy: A Retrospective Cohort Study

在线全文

学校读者我要写书评

暂无评论

Open Journal of Anesthesiology 2024年第7期14卷 159-174页

作者： Lionel Diyamona Manon colin Marc Léone Laurent Zieleskiewicz Joseph nsiala Wilfrid Mbombo Rachel Mbala Bruno Pastene Chris nsituavibidila Dan Kankonde Gracia Likinda Jean Claude Mubenga Khazy Anga noelly Mukuna Christel Isengingo Department of Anaesthesia and Intensive Care University Clinics of Kinshasa University of Kinshasa Kinshasa Democratic Republic of the Congo Department of Anaesthesia and Intensive Care Marseilles Nord Hospital Marseille France General Hospital of Kinshasa ex Mama Yemo Kinshasa Democratic Republic of the Congo Department of Anaesthesia and Intensive Care Monkole Hospital Centre Kinshasa Democratic Republic of the Congo

Objective: Postoperative pain (POP) following abdominal surgery can vary from a few hours to several days. This acute, unrelieved pain can become chronic, requiring patients to take analgesics on an almost daily basis for comfort. Analgesia using general opioids has many side effects and intrathecal morphine is a good alternative. This study was conducted to evaluate the efficacy of intrathecal morphine (ITM) versus conventional analgesia in the management of postoperative pain in colectomy performed by laparoscopic surgery. Methods: Cohort study conducted at the Hôpital nord in Marseille, from 01 January to 31 July 2021 in patients aged at least 18 years undergoing anaesthesia for scheduled colectomy by laparoscopic surgery. The primary endpoint was postoperative pain intensity and the secondary endpoints were morphine consumption, treatment side effects and length of hospital stay. Statistical analysis was performed using XLSTAT software. Results: We included 193 patients: 131 in the control group (conventional analgesia) and 62 in the ITM group. We observed: a significant decrease in pain (assessed by numerical scale) in favour of the ITM group in the post-anaesthetic care room, i.e. 3 (±4) vs 1 (±2), p 0 and H2: 2 (±2) vs. 1 (±2);p Conclusion: These results suggest that intrathecal morphine (ITM) in laparoscopic colectomy provides effective postoperative analgesia with low morphine consumption, and a reduction in morphine side-effects compared with conventional analgesia.

关键词： Intrathecal Morphine Colectomy Laparoscopy Conventional Analgesia

Paleoclimate and Paleoenvironment of Gonghe Basin, Qinghai-Tibet Plateau, During the Lastdeglacial: Weathering, Erosion and Vegetation Cover Affect Clay Mineral Formation

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2014年第2期88卷 647-660页

作者： SUn Qingfeng Christophe colin Faculty of Geography Northwest Normal University Laboratoire des Interactions et Dynamique des Environnements de Surface (IDES) UMR 8148CNRS Université de Paris-Sud

With the analysis of the sources and formation mechanism of the clay minerals in the sediment core from the Dalianhai lake in the Gonghe Basin,northeastern Tibet-Qinghai Plateau,clay mineral composition proxies,grain-size and carbonate contents have been employed for high-resolution study in order to reconstruct East Asian Summer Monsoon （EASM） over the northeastern Tibet-Qinghai Plateau during the *** study also extended to establish a relationship between vegetation cover changes and erosion during the last 14.5 ka with pollen record and clay mineral ***/kaolinite and smectite/（illite＋chlorite） ratios allow us to assess hydrolysis conditions in lowlands and/or physical erosion process in highlands of the Gonghe *** 12.9 Cal ka BP,both mineralogical ratios show low values indicative of strong physical erosion in the basin with a dominant cold and dry *** 12.9 Cal ka BP,an increase in both mineralogical ratios indicates enhanced chemical weathering in the basin associated with a warm and humid *** beginning of Holocene is characterized by high smectite/（illite＋chlorite） and smectite/kaolinite ratios that is synchronous as with deposition of many peat laminae,implying the best warm and humid conditions specifically between 8.0 to 5.5 Cal ka *** time interval after 5.0 Cai ka BP is characterized by a return to high physical erosion and low chemical weathering with dry climate conditions in the *** variations of clay mineral assemblages with previous pollen results,we observe a rapid response in terms of chemical weathering and physical erosion intensity to a modification of the vegetation cover in the basin.

关键词： clay minerals vegetation Gonghe Basin Tibet-Qinghai Plateau Asian monsoon Holocene

Smart Sediment Particle: A novel approach to investigating fluvial bed entrainment using instrumented sensors

在线全文

学校读者我要写书评

暂无评论

International Journal of Sediment Research 2023年第1期38卷 66-82页

作者： Yushu Xie Bruce W.Melville Asaad Y.Shamseldin colin n.Whittaker Yifan Yang Department of Civil and Environmental Engineering The University of Auckland School of Engineering The University of Waikato

The Smart Sediment Particle(SSP) instrumented with multiple sensors to obtain tri-axial linear accelerations is used for studying the mechanism of coarse grain entrainment. Three bed arrangements are tested to examine their influences on entrainment processes and the threshold force and impulse conditions. The SSP shows satisfactory precision to capture the imperceptible movement tendencies immediately(e.g., 0.15 s) after the dislodgement. The experimental results show that bed packing can significantly affect the particle’s entrainment threshold and the path of movement. Lateral movement is predominant for some cases because the entrainment path is based on the least work done by the flow,even if the direction is not aligned with the flow. The concept of effective protrusion height is proposed to quantify the effect of local bed arrangement on entrainment. The mean velocity field around the SSP is also measured together with the acceleration data. The mean threshold velocity and resultant impulse show consistent dependence on the bed arrangement. In general, the SSP shows a good prospect of being used to study small-scale entrainment mechanism.

关键词： Smart Sediment Particle Instrumented sensors Entrainment behaviours Tri-axial acceleration Hydrodynamic force impulse

A review of hydrogen technologies and engineering solutions for railway vehicle design and operations

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Railway Engineering Science 2021年第3期29卷 212-232页

作者： Yan Sun M.Anwar n.M.S.Hassan Maksym Spiryagin colin Cole Centre for Railway Engineering Central Queensland UniversityRockhamptonQLDAustralia

Interest in hydrogen-powered rail vehicles has gradually increased worldwide over recent decades due to the global pressure on reduction in greenhouse gas emissions,technology availability,and multiple options of power *** the past,research and development have been primarily focusing on light rail and regional trains,but the interest in hydrogen-powered freight and heavy haul trains is also *** review shows that some technical feasibility has been demonstrated from the research and experiments on proof-of-concept *** rail vehicles powered by hydrogen either are currently operating or are the subject of experimental *** paper identifies that fuel cell technology is well developed and has obvious application in providing electrical traction power,while hydrogen combustion in traditional IC engines and gas turbines is not yet well *** need for on-board energy storage is discussed along with the benefits of energy management and control systems.

关键词： Hydrogen Fuel cells Hybrid power Rail vehicles Greenhouse gas emissions

Localization and the possible role of plasminogen activators and inhibitors in early stages of placentation

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2000年第22期45卷 2056-2062页

作者： Ockleford colin D Department of Pre-Clinical Sciences University of LeicesterLeicester LEI 9HNUK

The distribution of mRnAs of tissue type (t) and urokinase type (u) plasminogen activator (PA) plus their corresponding inhibitors, type-1 (PAI-1) and type-2 (PAI-2) have been studied in the tissues of human first and second trimester placentae by in situ hybridization. The results show that: (i) All the molecules, tPA, uPA, PAI-1 and PAI-2, were identified in the blood vessels, the majority of extravillous trophoblastic cells of the decidual layer between Rohr’s and nitabuch’s stria and in the trophoblast cells lining the chorionic plate, basal plate, intercotyledonary septae and cytotrophoblast cells of the chorionic villous tree. (ii) no expression of such probes was observed in the basal and chorionic plate, glandular cells of the decidua, the septal tissues or the villous core mesenchyme. The co-distribution of the molecules observed suggests that the co-ordinated expression of the activators and inhibitors in various cells of the placental tissue may play a role in angiogenesis related to

关键词： plasminogen activator plasminogen activator inhibitor placentation angiogenesis in situ hybridization.

Coupler force and fatigue assessments with stochasticdraft gear frictions

在线全文

学校读者我要写书评

暂无评论

Journal of Traffic and Transportation Engineering(English Edition) 2023年第1期10卷 1-12页

作者： Qing Wu colin Cole Maksym Spiryagin Centre for Railway Engineering Central Queensland UniversityRockhamptonQLD 4701Australia

Train dynamics and component fatigue assessments are important steps towards successful operations of long heavy haul *** train dynamics(LTD)simulation is an effective and efficient approach in this *** gear friction has been known to have a strong stochastic ***,relevant train dynamics simulations have not been reported in open *** paper uses experimental data to extract the stochastic feature of draft gear *** stochastic feature is then introduced into LTD *** force and fatigue damage assessments were conducted by simulating a heavy haul train that has 244 vehicles and weighs nearly 30,000 *** results show that average in-train force variations due to stochastic friction were 55 and 40 kn for the traction and air brake cases respectively;maximum force variations were 207 and 98 kn for the traction and air brake cases *** fatigue calculations are even more sensitive to stochastic draft gear friction;the largest variations can be up to 700 times different due to the strong nonlinearity of fatigue calculation *** friction is an unavoidable nature in friction draft *** using stochastic draft gear friction can deliver results that are more robust and reliable.

关键词： Stochastic friction Draft gear Train dynamics Coupler fatigue Laboratory testing

Localization and possible role of membrane type metallo-proteinase and tissue inhibitors of metalloproteinase-1 in early stages of placentation

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2000年第16期45卷 1484-1489页

作者： Ockleford colin D. Department of Pre-Clinical Sciences University of LeicesterLeicester LEI 7RHUK

Human placental tissues from the first and second trimesters of gestation have been investigated using riboprobe in situ hybridisation of mRnA sequences coding for membrane type metalloproteinase (MT-1-MMP) and tissue inhibitors of metalloproteinase-1 (TIMP-1). Results show that (i) both mRnAs express at a relatively high level in the chorion laeve trophoblast cells and the adjacent decidual cells of fetal membrane; (ii) the most abundant expression of the two mRnAs was found in the extravillous trophoblast between Rohrs and nitabuch striae of basal plate, trophoblast shell and gland cells of the decidua; (iii) isolated or small groups of cytotrophoblast cells in the chorionic villi and in the cells lining arterioles in decidua and stem villi also expressed both MT-1-MMP and TIMP-1 at defferent extents. The data suggest that the coordinated expression of the MT-MMP and its inhibitor TIMP in defferent cells of the placental tissue may play an essential role in trophoblast invasion and angiogenesis

关键词： placenta trophoblast basal plate fetal membrane MT-l-MMP TIMP-1 in situ hybridization.

Hoare logic-based genetic programming

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2011年第3期54卷 623-637页

作者： JOHnSOn colin G. Computing Laboratory University of Kent

Almost all existing genetic programming systems deal with fitness evaluation solely by testing. In this paper, by contrast, we present an original approach that combines genetic programming with Hoare logic with the aid of model checking and finite state automata, henceby proposing a brand new verification-focused formal genetic programming system that makes it possible to evolve reliable programs with mathematically-verified properties.

关键词： genetic programming program verification Hoare logic model checking finite state automata

Refining spatial neighbourhoods to capture terrain effects

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Ecological Processes 2012年第1期1卷 98-108页

作者： Trisalyn A nelson colin Robertson Spatial Pattern Analysis and Research Lab Department of GeographyUniversity of VictoriaPO Box 3060VictoriaBritish ColumbiaV8W 3R4SCanada Department of Geography and Environmental Studies Wilfrid Laurier UniversityWaterlooOntarioN2L 3C5Canada

Introduction:Spatially explicit ecological research has increased substantially in the past 20 *** spatial approaches require the definition of a spatial neighbourhood or the region over which spatial relationships are modelled or *** neighbourhood definitions impact analysis results,and there are benefits in considering neighbourhood definitions that better capture ecological *** goal of this research is to present a simple and flexible approach in constraining ecological spatial neighbourhoods using terrain ***:Using watershed boundaries,we can restrict spatial neighbourhoods from combining populations or processes that should be separated by terrain *** demonstrate the need for ecological constraints by way of a simulation study and highlight our approach with a case study examining mountain pine beetle(Dendroctonus ponderosae,Coleoptera;Hopkins)infestation hot ***:Our results demonstrate how failure to constrain neighbourhoods can lead to errors when the spatial signals from unrelated populations are ***,unconstrained spatial neighbourhoods can unintentionally detect spatial relationships across many ***:There will be benefits to studies that develop new,ecology-based approaches in defining spatial neighbourhoods that better illuminate ecological function of phenomena under study.

关键词： spatial weights spatial analysis spatial ecology hot spots topography