检索结果-南通市图书馆

Interspecific comparison of the flight performance between sparrowhawks and common buzzards migrating at the Falsterbo peninsula： A radar study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Current Zoology 2014年第5期60卷 670-679页

作者： Gintaras MALMIGA Cecilia nilsson johan BACKMAN Thomas ALERSTAM Department of Biology Lund University SE-22362 Lund Sweden

In order to compare the two species＇ flight performance over the exposed and windy Falsterbo Peninsula, where thermal conditions seldomly are very favorable, we used tracking radar to study flight parameters of sparrowhawks Accipiter ni- sus and common buzzards Buteo buteo during autumn migration. The results showed a clear difference between sparrowhawks and common buzzards in their flight altitudes and speeds, and in the wind conditions they encountered. Common buzzards had higher flight altitudes and were more selective of wind. Flight altitude was negatively related to the wind speed, which was most pronounced for common buzzards. Sparrowhawks had higher mean air- and cross-country speeds than common buzzards. Air- speed was negatively related, whereas ground and cross-country speeds were positively related to the tailwind component for both raptors. The differences between sparrowhawks and buzzards could to a large degree be explained by a larger dependence on thermal soaring among the common buzzards; a strategy associated with selectivity for favourable thermal and wind conditions during migratory flight. An additional important explanation for the interspecific differences was the habit of the sparrowhawks to combine migratory flight with hunting for prey, which makes it prone to fly at lower altitudes and use flapping flight to a much larger degree than common buzzards which do not forage during their migratory passage of the Falsterbo Peninsula [Current Zoo- logy 60（5）： 670-679, 2014].

关键词： Tracking radar Raptor migration Sparrowhawk Common buzzard Flight performance Interspecific comparison Falsterbo peninsula

Risk factors and outcomes for patients with pancreatic cancer undergoing surgical exploration without resection due to metastatic disease:A national cohort study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Hepatobiliary & Pancreatic Diseases International 2022年第3期21卷 279-284页

作者： Emil Sahlstrom Paulina Bereza-Carlson johan nilsson Bobby Tingstedt Bodil Andersson Department of Clinical Sciences Lund SurgeryLund UniversitySweden Department of Surgery Central Hospital KristianstadSweden Department of Translational Medicine Cardiothoracic surgery and bioinformaticsLund UniversitySweden Department of Thoracic and vascular surgery Skane University hospitalLundSweden Department of Surgery Skane University HospitalLundSweden

Background:Unresectable disease is sometimes diagnosed during surgery in patients with pancreatic ductal adenocarcinoma(PDAC).This study aimed to identify preoperative risk factors for metastatic disease diagnosed at surgical exploration and to investigate and compare survival in resected and nonresected ***:Patients were identified from the Swedish National Pancreatic and Periampullary Cancer Registry *** of metastatic disease were evaluated with a multivariable logistic regression model,and survival was evaluated with Kaplan-Meier estimates and log-rank ***:In total,1938 patients with PDAC were scheduled for *** unresectable situation was diagnosed intraoperatively in 399 patients(20.6%),including 234(12.1%)with metastasized *** risk factors for metastasis were involuntary weight loss(OR=1.72;95%CI:1.27-2.33)and elevated carbohydrate antigen 19-9(CA19-9)(35-599 U/m L,OR=1.79,95%CI:1.11-2.89;≥600 U/m L,OR=3.24,95%CI:2.04-5.17).Overall survival was lower among patients with metastasized disease than that among patients with a resectable tumor(P<0.001).Conclusions:Involuntary weight loss and an elevation of CA19-9 are preoperative risk factors for diagnosing metastasized disease during surgical exploration.

关键词： Pancreatic cancer Surgery Metastasized Exploration

A NOVEL METHOD FOR RAPID DESIGN AND EVALUATION OF PHOTOVOLTAIC CONCENTRATORS

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A NOVEL METHOD FOR RAPID DESIGN AND EVALUATION OF PHOTOVOLTA...

Design and Benchmark Tests of a Multi-Channel Hydrophone Array System for Dolphin Echolocation Recordings

2007世界太阳能大会：太阳能与人类居住

作者： johan nilsson Division of Energy and Building Design Lund UniversityBox 118 221 00 LundSweden

The electrical output of low concentration systems with standard pv cells is heavily impaired by non uniform irradiation distribution on the *** order to design new concentrators that improve the system efficiency by homogenizing the light,a new method of evaluation has been *** is based on simulations,and generates an estimated annual *** method consists of three steps,optical simulation of the concentrator,electrical simulations of the cells in the concentrator at a certain solar angle of incidence,and system simulations of the annual *** an example,the method is used in the design of a stationary wall concentrator.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Open Journal of Acoustics 2012年第3期2卷 121-130页

作者： Josefin Starkhammar Mats Amundin johan nilsson Tomas Jansson Monica Almqvist Hans W. Persson Department of Measurement Technology and Industrial Electrical Engineering Lund University Lund Sweden

This paper describes in depth the design and application considerations of a computer based measurement system enabling 1 MS/s simultaneous sampling of 47 hydrophones for cross sectional recordings of echolocation beams of toothed whales (Odontocetes). An earlier prototype version of the system has previously only been presented as a brief proof of principle that did not offer a complete description of the software and hardware solution. Crucial hardware and software design considerations of the further developed system include the re-arm times of the burst mode sampling and the dual-core distributed execution of the software components. The rearm time was measured to 283 μs, using a 550 μs long sample window around each click. This enables burst mode sampling of clicks with an inter-click interval as short as 833 μs. It is shown through both synthetic benchmark tests of the system and through field measurements of bottlenose dolphins (Tursiops truncatus) and a beluga whale (Delphinapterus leucas) that it is capable of acquiring, analyzing and visualizing data in run-time. It operates effectively also in highly reverberant surroundings like concrete pools and shallow waters. Burst mode sampling allows the system to block reflections with 0.3 - 0.5 m longer propagation paths than the direct path. It is suggested that the system’s compliance to reverberant recording sites makes it valuable in future dolphin echolocation studies.

关键词： Dolphin Echolocation Measurement System Hydrophone Array Burst Mode Sampling

Why People Live in Flood-Prone Areas in Akuressa, Sri Lanka

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Disaster Risk Science 2018年第2期9卷 143-156页

作者： johan Askman Olof nilsson Per Becker Division of Risk Management and Societal Safety Lund University

To investigate why people live in areas at high risk of floods, a qualitative case study was carried out in the areas around Akuressa, in southwest Sri Lanka. Data collection consisted mainly of semistructured interviews with local residents and government officials. The purpose was to study why people live in areas at high risk of floods, by looking beyond the purely physical aspects of living with hazards and exploring the underlying social factors. Four main factors were identified: an overall good living situation; a sense of place; difficulties relocating; and being well-adapted to the situation. The analysis also examined whether government officials shared the views of local residents. The findings highlighted both areas of consensus and discrepancies related to risk awareness, and the efficiency of risk reduction measures that had been implemented by the government. The case study identified and explored underlying social factors, such as risk normalization, risk trade-offs, and push-and-pull processes, which seem to influence the decision to live in a high-risk area.

关键词： Flood risk Risk awareness Risk perception Sri Lanka

Aetiology of Tick-Borne Infections in an Adult Swedish Population—Are Co-Infections with Multiple Agents Common?

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Open Journal of Clinical Diagnostics 2014年第1期4卷 31-40页

作者： Marika Nordberg Pia Forsberg johan Berglund Anneli Bjoersdorff Jan Ernerudh Ulf Garpmo Mats Haglund Kenneth nilsson Ingvar Eliasson Infectious Medicine Department of Clinical and Experimental MedicineFaculty of Health SciencesLinkoping UniversityLinkopingSweden Department of Infectious Diseases County Council of OstergotlandLinkopingSweden Blekinge Institute of Technology School of Health ScienceKarlskronaSweden Djursjukhusgruppen DanderydSweden Clinical Immunology Department of Clinical and Experimental MedicineFaculty of Health SciencesLinkoping UniversityDepartment of Clinical Immunology and Transfusion MedicineCounty Council of OstergotlandLinkopingSweden Department of Clinical Microbiology Kalmar County HospitalKalmarSweden Department of Infectious Diseases Kalmar County HospitalKalmarSweden Unit of Clinical Microbiology/Infectious Diseases Department of Medical SciencesUppsala UniversityUppsalaSweden Department of Laboratory Medicine Norra Alvsborg County HospitalTrollhattanSweden

In Scandinavia, tick-borne infections affecting humans include Lyme borreliosis (LB), tick-borne encephalitis (TBE) and human granulocytic anaplasmosis (HGA). Each of these infections can present with unspecific symptoms. In this prospective clinical study, we recruited patients based on two independent inclusion criteria;1) patients with unspecific symptoms, i.e. fever (≥38.0℃) or a history of feverishness and/or any combination of headache, myalgia or arthralgia and 2) patients with erythema migrans (EM), following an observed tick bite or tick exposure within one month prior to onset of symptoms. A total of 206 patients fulfilled the study. Among these, we could identify 186 cases of LB (174 with EM), 18 confirmed and two probable cases of HGA and two cases of TBE. Thirteen of the HGA cases presented without fever. Furthermore, 22 of the EM patients had a sub-clinical co-infection with Anaplasma phagocytophilum, based on serology. Both TBE cases had co-infections, one with Borrelia burgdorferi and one with Anaplasma phagocytophilum. We conclude that it is important to consider several causative agents and possible co-infections in the clinical management of infectious diseases where ticks may be suspected as vectors.

关键词： Epidemiology Tick-Borne Infections Tick-Borne Encephalitis Lyme Borreliosis Human Granulocytic Anaplasmosis

Endoscopic retrograde cholangiopancreatography with rendezvous cannulation reduces pancreatic injury

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2013年第36期19卷 6026-6034页

作者： Fredrik Swahn Sara Regnér Lars Enochsson Lars Lundell johan Permert Magnus nilsson Henrik Thorlacius Urban Arnelo Division of Surgery Department of Clinical Science Intervention and TechnologyKarolinska Institutet Department of Surgical Gastroenterology Karolinska University Hospital Department of Clinical Science Lund University Skne University Hospital Department of Surgery Skne University Hospital

AIM:To examine whether rendezvous endoscopic retrograde cholangiopancreatography(ERCP)is associated with less pancreatic damage,measured as leakage of proenzymes,than conventional ***:Patients(n=122)with symptomatic gallstone disease,intact papilla and no ongoing inflammation,were prospectively enrolled in this case-controldesigned ***-one patients were subjected to laparoscopic cholecystectomy and if intraoperative cholangiography suggested common bile duct stones(CBDS),rendezvous ERCP was performed intraoperatively(n=40).Patients with a negative cholangiogram constituted the control group(n=41).Another 41 patients with CBDS,not subjected to surgery,underwent conventional *** proenzymes,procarboxypeptidase B and trypsinogen-2 levels in plasma,were analysed at 0,4,8 and 24 *** proenzymes were determined in-house with a double-antibody enzyme linked immunosorbent *** amylase was measured by an enzymatic colourimetric modular analyser with the manufacturer’s *** samples were blinded at ***:Post ERCP pancreatitis(PEP)occurred in3/41(7%)of the patients cannulated with conventional ERCP and none in the rendezvous *** serum levels indicating pancreatic leakage were significantly higher in the conventional ERCP group compared with the rendezvous ERCP group regarding pancreatic amylase levels in the 4-and 8-h samples(P=0.0015;P=0.03),procarboxypeptidase B in the4-and 8-h samples(P<0.0001;P<0.0001)and trypsinogen-2 in the 24-hour samples(P=0.03).No differences in these markers were observed in patients treated with rendezvous cannulation technique compared with patients that underwent cholecystectomy alone(control group).Post procedural concentrations of pancreatic amylase and procarboxypeptidase B were significantly correlated with pancreatic duct cannulation and ***:Rendezvous ERCP reduces pancreatic enzyme leakage compared with conventional ERCP cannulation ***,l

关键词： Common bile duct stones Procarboxypeptidase B Trypsinogen-2 Pancreatic amylase Intraoperative endoscopic retrograde cholangiopancreatography

在联合二甲双胍治疗2型糖尿病患者时,沙格列汀非劣於格列吡嗪

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

在联合二甲双胍治疗2型糖尿病患者时,沙格列汀非劣於格列吡嗪

在联合二甲双胍治疗2型糖尿病患者时,沙格列汀非劣于格列吡嗪

中华医学会第十一次全国内分泌学学术会议

作者： Burkhard Goke Baptist Gallwitz johan Eriksson Asa Hellqvist Ingrid Gause-nilsson Ludwig Maximilian University of Munich MunichGermany Klinikum der Eberhard-Karls-Universitat Tubingen Medizinische Klinik TubingenGermany Helsinki University Central Hospital Helsinki AstraZeneca MolndalSweden

背景和目的根据统计,中国糖尿病患病人数超过九千万人,是世界上糖尿病患者最多的国家。多数2型糖尿病(T2DM)患者经过二甲双胍(MET)单药治疗无法维持血糖控制。这是一项52周多中心随机双盲非劣效的3b期临床研究,比较沙格列汀(SAXA,选择...

背景和目的根据统计,中国糖尿病患病人数超过九千万人,是世界上糖尿病患者最多的国家。多数2型糖尿病(T2DM)患者经过二甲双胍(MET)单药治疗无法维持血糖控制。这是一项52周多中心随机双盲非劣效的3b期临床研究,比较沙格列汀(SAXA,选择性二肽基肽脢-4[DPP-4]抑制剂)或格列吡嗪(GPZ)在接受MET治疗而血糖控制不佳的T2DM患者中的疗效和安全性。材料和方法T2DM患者(N=858),HbA1c介于6.5%-10%

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

在联合二甲双胍治疗2型糖尿病患者时,沙格列汀非劣于格列吡嗪