document

Immediate versus delayed removal of urinary catheter after laparoscopic hysterectomy: A randomised controlled trial

Sandberg, E. M. (author), Twijnstra, A.R.H. (author), van Meir, C. A. (author), Kok, H. S. (author), van Geloven, N. (author), Gludovacz, K. (author), Kolkman, W. (author), Nagel, H.T.C. (author), Haans, L.C.F. (author), Kapiteijn, K. (author), Jansen, F.W. (author)

Objective: To evaluate if immediate catheter removal (ICR) after laparoscopic hysterectomy is associated with similar retention outcomes compared with delayed removal (DCR). Study design: Non-inferiority randomised controlled trial. Population: Women undergoing laparoscopic hysterectomy in six hospitals in the Netherlands. Methods: Women were...

journal article 2019

document

Fate and removal of trace pollutants from an anion exchange spent brine during the recovery process of natural organic matter and salts

Vaudevire, E.M.H. (author), Radmanesh, Farzaneh (author), Kolkman, Annemieke (author), Vughs, Dennis (author), Cornelissen, Emile (author), Post, Jan (author), van der Meer, W.G.J. (author)

The results of this sampling campaign on pilot scale processes aim to evaluate the occurrence and behavior of trace organic micro-pollutants and metal elements during anion exchange treatment of surface water and the subsequent treatment of generated spent brine with two types of electrodialysis membrane pairs. This knowledge is relevant to...

journal article 2019

document

Feasibility of noncontact piezoelectric detection of photoacoustic signals in tissue-mimicking phantoms

Kolkman, R.G.M. (author), Blomme, E. (author), Cool, T. (author), Bilcke, M. (author), Van Leeuwen, T.G. (author), Steenbergen, W. (author), Grimbergen, K.A. (author), Den Heeten, G.J. (author)

The feasibility of air-coupled ultrasound transducers to detect laser-induced ultrasound from artificial blood vessels embedded in an optically scattering phantom is demonstrated. These air-coupled transducers allow new applications in biomedical photoacoustic imaging where contact with tissue is not preferred. One promising application of such...

journal article 2010

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The influence of experience and camera holding on laparoscopic instrument movements measured with the TrEndo tracking system

Chmarra, M.K. (author), Kolkman, W. (author), Jansen, F.W. (author), Grimbergen, C.A. (author), Dankelman, J. (author)

journal article 2007

document

Dynamic behaviour of hydraulic structures

Kolkman, P.A. (author), Jongeling, T.H.G. (author)

English translation of ""Dynamisch gedrag van waterbouwkundige constructies". The subject is treated from the standpoint of hydrodynamics and applied mechanics, in which a certain knowledge of both fields of study is presupposed. The interaction phenomena are discussed on that basis. The subject matter is not treated exhaustively, but the book...

report 2007

document

Pilot study for modelling gas turbine component behaviour: Part VI: Inventory of material and lifing models

Kolkman, H.J. (author), van Rijn, J.C.F.N. (author)

The lifing of gas turbine components is a complex process. It entails a number of modelling steps in which various disciplines are involved. The current work provides information relevant to the determination of the stress and strain distributions in a component, and the evaluation of these distributions in terms of a relevant material model....

report 1996

document

Materiaalkeuze voor vliegende gasturbines

Kolkman, H.J. (author)

Het gebruik van non-ferrometaien in de fieetste delen van straalmotoren spreekt vanzelf. In compressoren van straalmotoren - met temperaturen tot 600 °C - worden echter zowel ijzerlegeringen als non-ferrometaien gebruikt. Op grond van mectianisctie eigensctiappen en gewicht verdienen titanium- en nikkel-legeringen hier de voorkeur. Dat er toch...

report 1996

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Dynamisch gedrag van waterbouwkundige constructies

Kolkman, P.A. (author), Jongeling, T.H.G. (author)

Het onderwerp wordt benaderd vanuit de hoek van de hydrodynamica en van de toegepaste mechanica, waarbij een zekere kennis van beide vakgebieden aanwezig wordt verondersteld. Hiervan uitgaande worden de interactieverschijnselen behandeld. Dit boek is niet uitputtend, maar wel worden grondslagen gepresenteerd waardoor de nogal specialistische...

report 1996

document

Gas turbine compressor corrosion and erosion in Western Europe

Kolkman, H.J. (author)

It is shown that for gas turbines in the West European environment: * during of)eration hygroscopic salts - notably ammonium sulphate (originating from manure) and sodium and magnesium chloride (from sea salt) - are deposited on compressor components. * during shutdowns these wet deposits acidify owing to the absorption of the air pollutants NO2...

report 1993

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Water-verzadigde grond

Kolkman, P.A. (author)

Schaalregels dynamisch onderzoek aan droge en met water verzadigde grond, schaalregels bij verweekte grond

report 1992

document

Vul- en ledigingsystemen van schutsluizen

Kolkman, P.A. (author)

Checklist voor het ontwerpen van vul- en ledigingssystemen van schutsluizen, troskrachten bij horizontaal bewegende schutkolk, troskrachten bij schutten, extra vulling of lediging van schutsluizen door traagheid in riolen, hydraulische aspecten van vul- en ledigingsystemen van schutsluizen

report 1992

document

Cavitatie

Kolkman, P.A. (author)

Algemene beschouwingen, cavitatie-inceptie getallen bij schuiven, voorwerpen en wanden

report 1992

document

Golfklappen

Kolkman, P.A. (author)

Maximale golfdrukken volgens stromingsdrukmodel, schokgolfmodel en waterpistonmodel

report 1992

document

Spuisluizen

Kolkman, P.A. (author)

Hevels, ontwerpeisen en enkele toepassingen, algemene ontwerp-aspecten spuisluizen

report 1992

document

Fender-constructies

Kolkman, P.A. (author)

Afmeerkrachten bij centrisch en excentrisch botsen van een schip tegen fenderpalen en bij aanvaren van een verend remmingwerk; invloed traagheid van het water op afmeerkrachten, aanvullende beschouwing betreffende botsen van schepen tegen remmingwerken (rekenen in tijddomein)

report 1992

document

Schuiven

Kolkman, P.A. (author)

Resonantietrillingen bij schuiven, teruggekoppelde trillingen bij een rioolschuif met afdrukinrichting, teruggekoppelde trillingen bij een sectroschuif en een cilinderschuif, hydraulische aspecten bij het ontwerpen van schuiven, methoden ter bepaling van de toegevoegde watermassa bij oscillerende beweging van voorwerpen in vloeistof, dominante...

report 1992

document

Ontgronding

Kolkman, P.A. (author)

Gecombineerde grafische voorstelling Moody/Shields voor de kritieke snelheid voor het begin van beweging van korrels, bepalende grootheden van evenwichtsdiepte en groei van ontgrondingskuilen

report 1992

document

Stress corrosion resistance of damage tolerant aluminium-lithium sheet materials

Kolkman, H.J. (author), Schra, L. (author)

The SCC resistances of three damage tolerant aluminium sheet materials were determined by means of the ASCOR (Automated Stress Corrosion Ring) test. The conventional damage tolerant sheet material 2024-T3 was used as reference. The sec resistance of 8090-T81 turned out to be only slightly lower than the sec resistance of 2024-T3. In contrast,...

report 1991

document

Stress corrosion resistance of damage tolerant aluminium-lithium sheet materials

Schra, L. (author), Kolkman, H.J. (author)

The SCC resistances of three damage tolerant aluminium sheet materials were determined by means of the ASCOR (Automated Stress COrrosion Ring) test. The conventional damage tolerant sheet material 2024-T3 was used as reference. The SCC resistance of 8090-T81 turned out to be only slightly lower than the SCC resistance of 2024-T3. In contrast,...

report 1991

document

Wasmiddelen voor gasturbines vallen vies tegen

Kolkman, H.J. (author)

Deposits are regularly removed from compressor blades and vanes of installed jet engines and gas turbines by compressor washing. Hereby a compressor cleaner is sprayed into the compressor while operating at reduced or normal r.p.m. Recently developed compressor cleaners are claimed to be ecologically sound. In addition, many new compressor...

report 1991