B. Jansen

Details der Publikationsliste

Zeitraum

1973 - 2009

Anzahl

125

Co-Autoren

Methyl ketones in high altitude Ecuadorian Andosols confirm excellent conservation of plant-specific n-alkane patterns (2009)

Jansen, B., Nierop, K.G.J.

To reconstruct past shifts in the upper forest line (UFL) in the Northern Ecuadorian Andes we are studying the applicability of plant-specific patterns of lipids preserved in soils as proxies for...

[25] C. Yu, and W. Meng. Principles of Database Query Processing for Advanced Applications. Morgan (2008)

B. Jansen, A. Spink, J. Bateman, T. Saracevic, Real Life, Information Retrieval, ...

[13] J. Kleinberg. Authoritative sources in Hyperlinked Environment. ACM-SIAM Symposium on Discrete

Klimaatgeschiedenis wijst op belangrijke rol van de zon (2008)

Geel, B. Van, Jansen, B.

De focus op koolstofdioxide (CO2) als veroorzaker van de huidige klimaatverandering is enorm. Echter, veranderende zonneactiviteit blijkt het klimaat sterk te beïnvloeden, bijvoorbeeld rond 800 v....

Characteristic straight-chain lipid ratios as a quick method to assess past forest–páramo transitions in the Ecuadorian Andes (2008)

Jansen, B., Haussmann, N.S., Tonneijck, F.H., Verstraten, J.M., Voogt, P. De

To assist sustainable reforestation efforts in the Andes in Northern Ecuador, the position of the natural upper forest line (UFL) has to be assessed. To this end, new vegetation reconstruction...

Stabilization of dissolved organic matter by aluminium: A toxic effect or stabilization through precipitation? (2008)

Scheel, T., Jansen, B., Wijk, A.J. Van, Verstraten, J.M., Kalbitz, K.

Carbon mineralization in acidic forest soils can be retarded by large concentrations of aluminium (Al). However, it is still unclear whether Al reduces C mineralization by direct toxicity to...

Basis- and Tripartition Identification for Quadratic Programming and Linear Complementarity Problems (2007)

From An Interior, B Jansen, A. B. Berkelaar, A. B. Berkelaar, A. B. Berkelaar, B. Jansen, ...

Optimal solutions of interior point algorithms for linear and quadratic programming and linear complementarity problems provide maximal complementary solutions. Maximal complementary solutions can be...

Can isoprenoids in leaves and roots of plants serve as biomarkers for past vegetation changes? A case study from the Ecuadorian Andes (2007)

Jansen, B., Nierop, K.G.J., Tonneijck, F.H., Verstraten, J.M.

Large-scale clear-cutting and burning caused the natural upper forest line (UFL) in the Northern Ecuadorian Andes to decline to the point that its 'natural' location now is uncertain. To obtain a...

Wereldrecord ijssmelten gebroken! (2007)

Jansen, B.

Op 15 augustus is er een wereldrecord gebroken en was de oppervlakte van het zee ijs op de noordpool kleiner dan ooit. Dat wil zeggen, kleiner dan ooit door mensen gemeten. Maar hoe zit het nou...

Klimaatverandering en verzuring van de zee: is het einde van de mossel in zicht? (2007)

Jansen, B.

Uit onderzoek is de laatste jaren duidelijk geworden dat hogere CO2 concentraties in de atmosfeer tot een hogere zuurgraad van de oceanen kunnen leiden. Experimenten waarin de oceaan en de atmosfeer...

Organic Matter in Volcanic Ash Soils under Forest (2007)

Nierop, K.G.J., Tonneijck, F.H., Jansen, B., Verstraten, J.M.

The volcanic ash soils along an altitudinal transect in Guandera Biological Station in northern Ecuador have been developed under varying vegetation around the upper forest line. Generally, the soils...

Wereldrecord ijssmelten gebroken! (2007)

Jansen, B.

Op 15 augustus is er een wereldrecord gebroken en was de oppervlakte van het zee ijs op de noordpool kleiner dan ooit. Dat wil zeggen, kleiner dan ooit door mensen gemeten. Maar hoe zit het nou...

Klimaatverandering en verzuring van de zee: is het einde van de mossel in zicht? (2007)

Jansen, B.

Uit onderzoek is de laatste jaren duidelijk geworden dat hogere CO2 concentraties in de atmosfeer tot een hogere zuurgraad van de oceanen kunnen leiden. Experimenten waarin de oceaan en de atmosfeer...

Vorkommen von Vancomycin-resistenten Enterokokken (VRE) in der aquatischen Umwelt während eines epidemischen Ausbruchs in einer Klinik und neue Ansätze zur Verhinderung des Eintrages in die Umwelt. (2007)

Kohnen, W., Schön-Hölz, K., Schwartz, T., Frey, W., Böhme, C., Hoffmann, D., ...

1.Jahrestagung der Gesellschaft für Hygiene, Umweltmedizin und Präventivmedizin (GHUP) und 10.Jahrestagung des Landesinstituts für den Öffentlichen Gesundheitsdienst NRW, Bielefeld,...

The applicability of Accelerated Solvent Extraction (ASE) to extract lipid biomarkers from soils (2006)

Jansen, B., Nierop, K.G.J., Kotte, M.C., Voogt, P. De, Verstraten, J.M.

We investigated the ability of accelerated solvent extraction (ASE) to extract selected lipid biomarkers (C-19=C-34 n-alkanes, n-alcohols and n-fatty acids as well as dehydroabietic acid and...

The straight-chain lipid biomarker composition of plant species responsible for the dominant biomass production along two altitudinal transects in the Ecuadorian Andes (2006)

Jansen, B., Nierop, K.G.J., Hageman, J.A., Cleef, A.M., Verstraten, J.M.

For a detailed reconstruction of historic upper forest line (UFL) positions, new proxies in addition to traditional pollen and vegetation analyses are needed. If the straight-chain lipid composition...

Copper complexation by tannic acid in aqueous solution (2006)

Kraal, P., Jansen, B., Nierop, K.G.J., Verstraten, J.M.

The speciation of titrated copper in a dissolved tannic acid (TA) solution with an initial concentration of 4 mmol organic carbon ((OC)/l was investigated in a nine-step titration experiment (Cu/oC...

Radiocarbon dating of soil organic matter fractions in Andosols in Northern Ecuador (2006)

Tonneijck, F.H., Plicht, J. Van Der, Jansen, B., Verstraten, J.M., Hooghiemstra, H.

Volcanic ash soils (Andosols) may offer great opportunities for paleoecological studies, as suggested by their characteristic accumulation of organic matter (OM). However, understanding of the...

Vital working hour schemes: The dynamic balance between various interests. (2006)

Kerkhof, G.A., Jansen , B.

"Balancing Interests", the theme of the 17th International Symposium on Shift Work and Working Time held in Hoofddorp, The Netherlands (September 2005), refers to the ambition to reach an optimal...

The straight-chain lipid biomarker composition of plant species responsible for the dominant biomass production along two altitudinal transects in the Ecuadorian Andes (2006)

Jansen, B., Nierop, K.G.J., Hageman, J.A., Cleef, A.M., Verstraten, J.M.

For a detailed reconstruction of historic upper forest line (UFL) positions, new proxies in addition to traditional pollen and vegetation analyses are needed. If the straight-chain lipid composition...

Evaluation of antibiotic resistances in wastewater pathways using molecular- and microbiological strategies. (2006)

Schwartz, T., Volkmann, H., Obst, U., Kohnen, W., Jansen, B.

16th Annual Meeting of the Society of Environmental Toxicology and Chemistry (SETAC Europe), Den Haag, NL, May 7-11, 2006 (Poster)

Modern strategies in the prevention of implant-associated infections (2005)

Kohnen, W, Becker, K, Jansen, B

The application of medical devices either for temporary or permanent use has become an indispensible part of almost all fields of medicine. However, foreign bodies are associated with a substantial...

The evolutionary language game: An orthogonal approach (2005)

Lenaerts, T, Jansen, B, Tuyls, K, De Vylder, B

Evolutionary game dynamics have been proposed as a mathematical framework for the cultural evolution of language and more specifically the evolution of vocabulary. This article discusses a model that...

Watersporen op Mars (kennislink: : http://www.kennislink.nl/web/show?id=139817) (2005)

Seijmonsbergen, A.C., Cammeraat, L.H., Jansen, B.

De discussie over het voorkomen van water op Mars, in vaste of vloeibare vorm, nu en in het verleden, is nog steeds in volle gang. Dat geldt ook voor het effect van mogelijk aanwezig water op de...

Mechanisms controlling the mobility of dissolved organic matter, aluminium and iron in podzol B horizons (2005)

Jansen, B., Nierop, K.G.J., Verstraten, J.M.

The processes governing the (im)mobilization of Al, Fe and dissolved organic matter (DOM) in podzols are still subject to debate. In this study we investigated the mechanisms of (im)mobilization of...

The evolutionary language game: An orthogonal approach (2005)

Jansen, B, De Vylder, B, LENAERTS, Theo, TUYLS, Karl

Evolutionary game dynamics have been proposed as a mathematical framework for the cultural evolution of language and more specifically the evolution of vocabulary. This article discusses a model that...

The evolutionary language game: An orthogonal approach (2005)

JLENAERTS, Theo, Jansen, B, TUYLS, Karl, De Vylder, B

Evolutionary game dynamics have been proposed as a mathematical framework for the cultural evolution of language and more specifically the evolution of vocabulary. This article discusses a model that...

Evaluation of antibiotic resistances in wastewater pathways using molecular- and microbiological strategies. (2005)

Volkmann, H., Schwartz, T., Obst, U., Kohnen, W., Jansen, B.

BioMicroWorld 2005 : Internat.Conf.on Environmental, Industrial and Applied Microbiology, Badajoz, E, March 15-18, 2005

Vancomycin-resistant enterococci (VRE) in the aquatic environment. (2005)

Kohnen, W., Schön-Hölz, K., Böhme, C., Schwartz, T., Obst, U., Jansen, B.

Biospektrum, (2005), Tagungsband zum 2.gemeinsamen Kongress der DGHM und VAAM, Göttingen, 25.-28.September 2005

ENDOR-Assisted Study of the Stable EPR Spectrum of X-Irradiated α-&LsansserB;-Sorbose Single Crystals: MLCFA and Simulation Decomposition Analyses (2004)

B. Jansen, F. J. Callens, E. Sagstuen

Vanhaelewyn, G. C. A. M., Jansen, B., Callens, F. J. and Sagstuen, E. ENDOR-Assisted Study of the Stable EPR Spectrum of X-Irradiated α-l-Sorbose Single Crystals: MLCFA and Simulation Decomposition...

ENDOR-assisted study of the stable EPR spectrum of X-irradiated alpha-L-sorbose single crystals: MLCFA and simulation decomposition analyses (2004)

Jansen, B, Callens, F J, Sagstuen, E

After X irradiation of single crystals of alpha-L-sorbose at 295 K, previous electron paramagnetic resonance (EPR), electron nuclear double resonance (ENDOR), and ENDOR-induced EPR (EI-EPR) results...

Mobilization of dissolved organic matter, aluminium and iron in podzol eluvial horizons as affected by formation of metal-organic complexes and interactions with solid soil material (2004)

Jansen, B., Nierop, K.G.J., Verstraten, J.M.

Interactions with dissolved organic matter (DOM) are generally believed to play a crucial role in the translocation of Al and Fe in acid sandy soils. Binding of Al and Fe to DOM affects their...

(Un)certainty of overall binding constants of Al with dissolved organic matter determined by the Scatchard approach (2004)

Jansen, B., Nierop, K.G.J., Vrugt, J.A., Verstraten, J.M.

One of the best approaches to date to obtain overall binding constants (Ko) for Al and dissolved organic matter (DOM) from acidic soil solutions is to collect `free? Al data with diffusive gradients...

Einfluss verschiedener Abwasserpfade auf die Antibiotikaresistenzlage in der aquatischen Umwelt. (2004)

Volkmann, H., Schwartz, T., Kohnen, W., Rissler, K., Wurtz, A., Jansen, B., ...

Jahrestagung der Fachgruppe Wasserchemische Gesellschaft der GDCh, Bad Saarow, 17.- 19.Mai 2004

Ein Indikatorsystem zum Nachweis von mehrfach resistenten Bakterien. (2004)

Kohnen, W., Schön-Hölz, K., Schwartz, T., Volkmann, H., Rissler, K., Wurz, A., ...

Jahrestagung der Fachgruppe Wasserchemische Gesellschaft der GDCh, Bad Saarow, 17.- 19.Mai 2004

Strategien zur Bewertung der Resistenzlage von Abwasserteilströmen. (2004)

Schwartz, T., Volkmann, H., Kohnen, W., Heberer, T., Jansen, B., Obst, U.

Arzneimittel in der Umwelt - zu Risiken und Nebenwirkungen fragen Sie das Umweltbundesamt, Veranstaltung des Umweltbundesamtes, Berlin, 29.-30.September 2004 (Poster)

Bcl-x(L) antisense oligonucleotides radiosensitise colon cancer cells (2003)

Selzer, E, Günsberg, P, Lucas, T, Meyer, H, Thallinger, C, ...

Advanced colon cancer is a malignancy with poor response to various treatment modalities including ionising radiation (IR) and chemotherapy. Both IR and chemotherapeutic agents have been shown to act...

Effect of glutathione depletion and hydrophilic bile acids on hepatic acute phase reaction in rats with extrahepatic cholestasis (2003)

Purucker, E, Gartung, C, Geier, A, Jansen, B, Winograd, R, ...

BACKGROUND: Extrahepatic cholestasis by biliary obstruction induces an acute phase reaction in the liver. It is a complex process involving cytokines, hormones and growth factors. To determine...

Equine melanoma in a population of 296 grey Lipizzaner horses (2003)

Simhofer, H, Scherzer, S, Zechner, R, Curik, I, Sölkner, J, ...

REASONS FOR PERFORMING STUDY: Equine melanomas occur most commonly in grey horses at age 5 years or more. Generally, benign and malignant melanomas are distinguished by microscopy, but a more...

Rifampin-impregnated silicone catheters: a potential tool for prevention and treatment of CSF shunt infections (2003)

Weitzel, A, Bonk, C, Kohnen, W, Roesner, D, Jansen, B

BACKGROUND: Infection continues to be one of the major complications of cerebro-spinal fluid shunting procedures. Recent insights in the pathophysiological mechanism of these foreign body infections...

Efficacy of NaOCl/H2O2 irrigation and GaAlAs laser in decontamination of root canals in vitro (2003)

Kohnen, W, Beck, M, Al Haj, H, Christoffers, A B, Götz, H, ...

BACKGROUND AND OBJECTIVES: To investigate the bactericidal effect of an 809 nm semiconductor laser alone, and in combination with NaOCl/H(2)O(2) irrigation in root canals in vitro. STUDY...

Mobility of Fe(II), Fe(III) and Al in acidic forest soils mediated by dissolved organic matter: influence of solution pH and metal/organic carbon ratios (2003)

Jansen, B., Nierop, K.G.J., Verstraten, J.M.

The mobility of Al and Fe in acidic sandy forest soils is greatly influenced by interactions with dissolved organic matter (DOM). We determined the distribution of Al, Fe(II) and Fe(III) over...

Occurence and spreading of antibiotic resistant bacteria in biofilms from wastewater, surface water and drinking water. (2003)

Schwartz, T., Kohnen, W., Jansen, B., Obst, U.

Jahrestagung 2002 der Vereinigung für Allgemeine und Angewandte Mikrobiologie (VAAM), Göttingen, 24.-27.März 2002

Emergence of antibiotic resistant Pseudomonas aeruginosa in wastewater and surface water systems. (2003)

Kohnen, W., Schön-Hölz, K., Schwartz, T., Künstler, M., Obst, U., Jansen, B.

55.Jahrestagung der Deutschen Gesellschaft für Hygiene und Mikrobiologie, Dresden, 28.September - 1.Oktober 2003 (Poster)

Resistenzsituation in der aquatischen Umwelt. (2003)

Kohnen, W., Schwartz, T., Künstler, M., Obst, U., Jansen, B.

Jahrestagung der Wasserchemischen Gesellschaft, Stade, 26.-28.Mai 2003

Influence of pH and metal/carbon ratios on soluble organic complexation of Fe(II), Fe(III) and A1(III) in soil solutions determined by diffusive gradients in thin films (2002)

Jansen, B., Nierop, K.G.J., Verstraten, J.M.

Soluble complexation of Al(III), Fe(II) and Fe(III) with dissolved organic matter (DOM) greatly influences the bioavailability and mobility of the metals as well as theDOMitself in acidic forest...

Dissolved organic matter, aluminium and iron interactions: precipitation induced by metal/carbon ratio, pH and competition (2002)

Nierop, K.G.J., Jansen, B., Verstraten, J.M.

To better understand the precipitation behaviour of dissolved organic matter induced by interactions with metals, a systematic titration experiment was conducted mimicking the soil solution...

Copper complexation by dissolved organic matter and uncertainty assessment of their stability constants (2002)

Nierop, K.G.J., Jansen, B., Vrugt, J.A., Verstraten, J.M.

The interaction of Cu with dissolved organic matter (DOM, extracted from an organic forest floor) was investigated and the resulting data was evaluated in terms of their uncertainty. The speciation...

Occurence and spread of resistant bacteria in wastewater and surface water systems. (2002)

König, H., Kohnen, W., Schwartz, T., Künstler, M., Obst, U., Jansen, B.

53.Tagung der Deutschen Gesellschaft für Hygiene und Mikrobiologie, Aachen, 30.September - 4.Oktober 2002

The limits of unilateralism from a European perspective (2000)

Jansen, B

'Unilateralism' is a sensitive issue in Europe. However, it is ill-defined and a serious effort is required to define this term of art. It needs to be contrasted to terms such as 'multilateralism',...

[Chronic liver disease after treatment of malignancies in children] (1999)

Krähe, J, Jansen, B, Ross, R S, Roggendorf, H, Havers, W

Chemotherapy, which has greatly improved the prognosis of children with malignant diseases, is potentially hepatotoxic. Furthermore, there is a risk for viral hepatitis acquired by blood products. In...

Notes, comments and developments. Some considerations on trade barriers erected for non-economic reasons and WTO obligations (1999)

Jansen, B, Lugard, M

The issue discussed in this note concerns the jurisdictional limitation of Article XX GATT 1994. The authors develop four distinct categories of trade barriers erected to protect non-economic...

Technetium-99m-tetrofosmin: a new agent for melanoma imaging? (1998)

Karanikas, G, Schlagbauer-Wadl, H, Jansen, B, Chehne, F, Rodrigues, M, ...

The aim of our study was to examine whether technetium-99m 1,2-bis[bis(2-ethoxyethyl) phosphino]ethane (tetrofosmin) a lipophilic, cationic tracer which was first developed for myocardial perfusion...

Potential Reduction Algorithms for Structured Combinatorial Optimization Problems (1997)

J. P. Warners, J. P. Warners, T. Terlaky, T. Terlaky, C. Roos, C. Roos, ...

Recently Karmarkar proposed a potential reduction algorithm for binary feasibility problems. In this paper we point out a practical drawback of his potential function and we propose a modified...

Long-Step Primal-Dual Target-Following Algorithms for Linear Programming (1996)

B. Jansen, B. Jansen, C. Roos, C. Roos, T. Terlaky, T. Terlaky, ...

In this paper we propose a method for linear programming with the property that, starting from an initial non--central point, it generates iterates that simultaneously get closer to optimality and...

Sensitivity Analysis in (degenerate) Quadratic Programming (1996)

Report Berkelaar Jansen, A. B. Berkelaar, A. B. Berkelaar, A. B. Berkelaar, B. Jansen, B. Jansen, ...

In this paper we deal with sensitivity analysis in convex quadratic programming, without making assumptions on nondegeneracy, strict convexity of the objective function, and the existence of a...

Long--Step Primal--Dual Target--Following Algorithms for Linear Programming (1996)

Jansen Roos, B. Jansen, C. Roos, T. Terlaky

In this paper we propose a long--step target--following methodology for linear programming. This is a general framework, that enables us to analyze various long--step primal--dual algorithms in the...

Long-Step Primal-Dual Target-Following Algorithms for Linear Programming (1995)

B. Jansen, C. Roos, T. Terlaky

In this paper we propose a long{step target{following methodology for linear programming. This is a general framework, that enables us to analyze various long{step primal{dual algorithms in the...

A Short Survey on Ten Years Interior Point Methods (1995)

Report Jansen Roos, B. Jansen, B. Jansen, B. Jansen, C. Roos, C. Roos, ...

The introduction of Karmarkar's polynomial algorithm for linear programming (LP) in 1984 has influenced wide areas in the field of optimization. While in 80s emphasis was on developing and...

A New Algorithm for the Computation of the Smallest Eigenvalue of a Symmetric Matrix and Its Eigenspace (1995)

B. Jansen, B. Jansen, B. Jansen, C. Roos, C. Roos, C. Roos, ...

The problem of finding the smallest eigenvalue and the corresponding eigenspace of a symmetric matrix is stated as a semidefinite optimization problem. A straightforward application of nowadays more...

Polynomiality of Primal-Dual Affine Scaling Algorithms for Nonlinear Complementarity Problems (1995)

B. Jansen, C. Roos, T. Terlaky, T. Terlaky, A. Yoshise, A. Yoshise, ...

This paper provides an analysis of the polynomiality of primal-dual interior point algorithms for nonlinear complementarity problems using a wide neighborhood. A condition for the smoothness of the...

A Potential Reduction Approach to the Frequency Assignment Problem (1995)

J. P. Warners, J. P. Warners, T. Terlaky, T. Terlaky, C. Roos, C. Roos, ...

The frequency assignment problem is the problem of assigning frequencies to transmission links such that either no interference occurs, or the amount of interference is minimized. We present an...

EUCLID CALMA Radio Link Frequency Assignment Project Report 2.3.2: Potential Reduction Methods (1995)

Delft Rlfap, H. Benthem, A. Hipolito, B. Jansen, C. Roos, T. Terlaky, ...

This report is concerned with Work Element 2.3.2: Potential reduction methods and Semidefinite programming, which is part of Subprogram 2.3: Testing Approximate Solution Techniques. The objective is...

EUCLID CALMA Radio Link Frequency Assignment Project Technical Annex T-2.3.2: Potential Reduction Methods (1995)

Delft Rlfap, H. Benthem, A. Hipolito, B. Jansen, C. Roos, T. Terlaky, ...

The frequency assignment problem is the problem of assigning frequencies to transmission links such that either no interference occurs and the number of used frequencies is minimized, or the amount...

EUCLID CALMA Radio Link Frequency Assignment Project Report 2.2.1: Implementation and Testing of Polyhedral Techniques and Interior Point Methods (1995)

K. I. Aardal, A. Hipolito, B. Jansen, C. Roos, T. Terlaky

g all the problems of a given class, would need significant theoretical advances. Moreover the choice of an approach is frequently based on several criteria (accuracy, speed, robustness, development...

EUCLID CALMA Radio Link Frequency Assignment Project Technical Annex T-2.2.1 A: A Branch-and-Cut Algorithm for the Frequency Assignment Problem (1995)

K. I. Aardal, A. Hipolito, B. Jansen, C. Roos, T. Terlaky, ...

The frequency assignment problem (FAP) is the problem of assigning frequencies to transmission links such that no interference occurs, and such that the number of used frequencies is minimized. We...

Improved complexity using higher-order correctors for primal-dual Dikin affine scaling (1994)

B. Jansen, B. Jansen, C. Roos, C. Roos, T. Terlaky, T. Terlaky, ...

In this paper we show that the primal--dual Dikin affine scaling algorithm for linear programming of Jansen, Roos and Terlaky enhances an asymptotical O( p nL) complexity by using corrector steps. We...

The Theory of Linear Programming: Skew Symmetric Self-Dual Problems and the Central Path (1994)

B. Jansen, B. Jansen, C. Roos, C. Roos, T. Terlaky, T. Terlaky

The literature in the field of interior point methods for linear programming has been almost exclusively algorithm oriented. Recently Guler, Roos, Terlaky and Vial presented a complete duality theory...

A Family of Polynomial Affine Scaling Algorithms for Positive Semi-Definite Linear Complementarity Problems (1993)

B. Jansen, B. Jansen, C. Roos, C. Roos, T. Terlaky, T. Terlaky

In this paper the new polynomial affine scaling algorithm of Jansen, Roos and Terlaky for LP is extended to PSD linear complementarity problems. The algorithm is immediately further generalized to...

Primal-Dual Target-Following Algorithms for Linear Programming (1993)

B. Jansen, B. Jansen, C. Roos, C. Roos, T. Terlaky, T. Terlaky, ...

In this paper we propose a method for linear programming with the property that, starting from an initial non--central point, it generates iterates that simultaneously get closer to optimality and...

A polynomial primal-dual Dikin-type algorithm for linear programming (1993)

B. Jansen, B. Jansen, C. Roos, C. Roos, T. Terlaky, T. Terlaky

In this paper we present a new primal--dual affine scaling method for linear programming. The method yields a strictly complementary optimal solution pair, and also allows a polynomial--time...

Interior-Point Methodology for Linear Programming: Duality, Sensitivity Analysis and Computational Aspects (1993)

B. Jansen, B. Jansen, C. Roos, C. Roos, T. Terlaky, T. Terlaky, ...

In this paper we use the interior point methodology to cover the main issues in linear programming: duality theory, parametric and sensitivity analysis, and algorithmic and computational aspects. The...

Foreign body associated infection (1993)

Jansen, B., Peters, G.

One of the major complications associated with the use of medical devices and implants is foreign body associated infection. Its significance in modern medicine and its pathogenesis are discussed....

Primal-Dual Algorithms for Linear Programming Based on the Logarithmic Barrier Method (1992)

B. Jansen, C. Roos, T. Terlaky, Barrier Method

In this paper we will deal with primal--dual interior point methods for solving the linear programming problem. We present a short step and a long step path--following primal--dual method and derive...

Karmarkar Algorithm (1992)

B. Jansen, B. Jansen, C. Roos, C. Roos, T. Terlaky, T. Terlaky

: In practice, understanding the behavior of the solution of the linear programming problem due to changes in the data is often as important as obtaining the optimal solution itself. Postoptimal...

In-vitro efficacy of a central venous catheter complexed with iodine to prevent bacterial colonization (1992)

Jansen, B., Kirstinsson, K. G., Jansen, S., Peters, G., Pulverer, G.

Infections of central venous lines are still a problem in daily medicine. Despite adequate antibiotic therapy, removal of an infected catheter often becomes necessary. A simple procedure has been...

Samoyed hereditary glomerulopathy (SHG). Evolution of splitting of glomerular capillary basement membranes.

Jansen, B., Thorner, P., Baumal, R., Valli, V., Maxie, M. G., Singh, A.

Samoyed hereditary glomerulopathy (SHG) in dogs resembles hereditary nephritis (HN) in man. Affected males and carrier females spontaneously develop proteinuria, but only males progress to renal...

Late onset endophthalmitis associated with intraocular lens: a case of molecularly proved S. epidermidis aetiology.

Jansen, B., Hartmann, C., Schumacher-Perdreau, F., Peters, G.

A case of severe endophthalmitis after cataract extraction followed by posterior chamber lens implantation is reported. Microbiological cultures from a tap of the patient's aqueous humour prior to...

A novel Ras antagonist regulates both oncogenic Ras and the tumor suppressor p53 in colon cancer cells.

Halaschek-Wiener, J., Wacheck, V., Schlagbauer-Wadl, H., Wolff, K., Kloog, Y., Jansen, B.

BACKGROUND: In colon cancer, K-Ras oncogenes, which appear to be linked to chemoresistance and poor prognosis, are activated in more than 50% of cases, whereas the tumor suppressor gene p53 is...

A branch-and-cut algorithm for the frequency assignment problem

Aardal,K.I., Hipolito,A., Jansen,B.

The frequency assignment problem (FAP) is the problem of assigning frequencies to transmission links such that no interference between signals occurs. This implies distance constraints between...

Deletions of the region 17p11-13 in advanced melanoma revealed by cytogenetic analysis and fluorescence in situ hybridization

Okamoto, I, Pirc-Danoewinata, H, Ackermann, J, Drach, J, Wadl, H Schlagbauer, Jansen, B, ...

The significance of the p53 tumour-suppressor gene in the oncogenesis of a variety of malignant tumours has been demonstrated over recent years. However, the role of p53 in human malignant melanoma...

Inducible nitric oxide synthase (iNOS) expression may predict distant metastasis in human melanoma

Tschugguel, W, Pustelnik, T, Lass, H, Mildner, M, Weninger, W, Schneeberger, C, ...

Expression of inducible nitric oxide synthase (iNOS) and its cellular localization was investigated in subcutaneous or lymph node metastases of human melanoma. Immunohistochemistry revealed that iNOS...