A5005158944- Ophthalmology and Visual Impairment Studies
- Corneal surgery and disorders
- Ionosphere and magnetosphere dynamics
- Intraocular Surgery and Lenses
- Solar and Space Plasma Dynamics
- Atmospheric Ozone and Climate
- Climate variability and models
- Glaucoma and retinal disorders
- Geophysics and Gravity Measurements
- Meteorological Phenomena and Simulations
- Earthquake Detection and Analysis
- Geomagnetism and Paleomagnetism Studies
- European history and politics
- GNSS positioning and interference
- Hybrid Renewable Energy Systems
- Ocular Surface and Contact Lens
- Ocean Waves and Remote Sensing
- Climate Change and Health Impacts
- Oceanographic and Atmospheric Processes
- Atmospheric aerosols and clouds
- Climate change impacts on agriculture
- Atmospheric and Environmental Gas Dynamics
- Hydrology and Watershed Management Studies
- German History and Society
- Hydrology and Drought Analysis
Rütgers (Germany)
2009-2025
Potsdam Institute for Climate Impact Research
2014-2025
Schweizer Hochschule für Logopädie Rorschach
2024
Laserklinik Karlsruhe
2014-2024
Asklepios Klinik Langen
2022-2023
Hohenstein Institute
2023
Cooke Aquaculture (Canada)
2023
European Central Bank
2023
Corbett Hospital
2022
Johannes Kepler University of Linz
2022
To present and analyze biometry data sets prevalence for corneal astigmatism in a large population.High-volume eye surgery center, Castrop-Rauxel, Germany.Axial length (AL), radii, anterior chamber depth (ACD), horizontal diameter (white-to-white [WTW] distance) were optically measured by partial coherence interferometry (IOLMaster). Patient acquired between 2000 2006 reviewed analyzed.The study evaluated 23,239 of 15,448 patients with median age 74 years. The mean values as follows: AL,...
Purpose To evaluate the accuracy of C constant for ray tracing–assisted intraocular lens (IOL) power calculation. Design Case series. Setting Public university hospital and private clinic. Methods Preoperatively, all distances were measured using laser biometry. Various IOL designs studied; powers ranged from −5.0 diopters (D) to +38.0 D. The calculation was performed with Olsen formula compared Haigis, Hoffer Q, Holladay 1, SRK/T formulas on optimized datasets. Outcome measures error...
Hydrogen is the quintessential eco-fuel. This invisible, tasteless gas most abundant element in universe. It basic building block and fuel of stars an essential raw material innumerable biological chemical processes. As a completely nonpolluting fuel, it may hold answer to growing environmental concerns about atmospheric accumulation carbon dioxide resultant Greenhouse Effect. In this book Peter Hoffmann describes current research toward hydrogen-based economy. He presents history hydrogen...
Climate change impacts on water availability and hydrological extremes are major concerns as regards the Sustainable Development Goals. Impacts hydrology normally investigated part of a modelling chain, in which climate projections from multiple models used inputs to impact models, under different greenhouse gas emissions scenarios, result amounts global temperature rise. While goal is generally investigate relevance changes for cycle, resources or extremes, it often case that variations...
Abstract. This study aims to compare impacts of climate change on streamflow in four large representative African river basins: the Niger, Upper Blue Nile, Oubangui and Limpopo. We set up eco-hydrological model SWIM (Soil Water Integrated Model) for all basins individually. The validation models shows results from adequate very good, depending quality availability input calibration data. For impact assessment, we drive with outputs five bias corrected Earth system Coupled Model...
Comparisons between tidal wind signatures diagnosed from satellite and ground‐based observations a general circulations model for two (September–October 2005, March–April 2007) of the four Climate Weather Sun‐Earth System (CAWSES) Global Tidal Campaign observation periods are presented (CAWSES is an international program sponsored by Scientific Committee on Solar‐Terrestrial Physics). Specific comparisons made (extended Canadian Middle Atmosphere Model), (Thermosphere Ionosphere Mesosphere...
To investigate agreement between the IOLMaster 700 based on swept-source optical coherence tomography (SS-OCT) and Lenstar LS 900 low-coherence reflectometry (OLCR).Private practice, Castrop-Rouxelle, Germany.Prospective evaluation of diagnostic test.Axial length (AL), keratometry (K), anterior chamber depth (corneal epithelium to lens) (ACD), lens thickness, central corneal thickness (CCT) were measured in 183 eyes patients. Analyses used a paired t test, Pearson correlation coefficient...
To evaluate the accuracy of intraocular lens (IOL) power calculation in a patient cohort with short axial eye length to assess performance IOL schemes strong hyperopes.The study was single centre, surgeon retrospective consecutive case series at Augen- und Laserklinik, Castrop-Rauxel, Germany. Inclusion patients after uneventful cataract surgery implanting either spherical (SA60AT) or aspheric (ZCB00) IOLs. criteria were <21.5 mm and/or emmetropising >28.5 D. Lens constants optimised on...
Abstract We investigate the contribution of anthropogenic forcing to extreme temperature and precipitation events in Central Asia (CA) during last 60 years. bias-adjust downscale two Inter-Sectoral Impact Model Intercomparison Project (ISIMIP) ensemble outputs, with natural (labelled as hist-nat , driven only by solar volcanic forcing) plus hist all-forcings), $$0.25^{\circ } \times 0.25 ^{\circ }$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mn>0</mml:mn>...
To study the effects of corneal imaging and focusing using a raytracing simulation with 2 3 surface models based on customized representations tomography data . Raytracing for epithelium (S1), stroma (S2) endothelium (S3) extracted from MS-39 anterior segment tomographer CSV export files. Customized were derived Gaussian Process Predictors, rays traced through cornea 3.5 mm aperture stop located 3.66 behind apex. 4 clinical examples evaluated: A) after hyperopic LASIK, B) myopic C)...
Mesospheric and stratospheric temperatures winds from several stations in Germany are analyzed for long‐term trends 1988–2008. Emphasis is on upper mesosphere (87 km) hydroxyl (OH) at Wuppertal (51°N, 7°E) that agree favorably with satellite‐borne observations Sounding of the Atmosphere Using Broadband Emission Radiometry a twin OH instrument Hohenpeißenberg (48°N, 11°E) operational since 2003. The two yield combined data set 80% time coverage suitable high resolution analyses. Annual mean...
Purpose: To compare corneal measurements obtained by a swept source fourier domain OCT (CASIA SS-1000), an autokeratometer (Haag-Streit Lenstar), hybrid topographer (Tomey TMS-5), Placido TMS-5 in mode) and Scheimpflug tomographer (Oculus Pentacam) to manifest subjective refraction.Methods: One hundred four pseudophacic patients with non-toric IOLs were measured at least 6 months after surgery. Corneal astigmatism as on the anterior surface well total including posterior data was compared...
PURPOSE: To evaluate the influencing factors on remaining astigmatism after implanting a toric intraocular lens (IOL) during cataract surgery. METHODS: This retrospective study included parameters that were considered to have an influence IOL power calculation. Therefore, data from literature and authors' own used. axial eye length, anterior chamber depth, central corneal thickness, radii (anterior posterior), diurnal changes of cornea, inter-device differences, rotational misalignment IOL,...
To explain the concept of Castrop lens power calculation formula and show application results from a large dataset compared to classical formulae.The vergence is based on pseudophakic model eye with 4 refractive surfaces. This was against SRKT, Hoffer-Q, Holladay1, simplified Haigis 1 optimized constant 3 constants. A preoperative biometric values, data postoperative refraction split into training test sets. The were used for optimization, cross-validation. Constant optimization performed...
Abstract Background Fever and hypothermia have been observed in septic patients. Their influence on prognosis is subject to ongoing debates. Methods We did a secondary analysis of large clinical dataset from quality improvement trial. A binary logistic regression model was calculated assess the association thermal response with outcome multinomial factors associated fever or hypothermia. Results With 6542 analyzable cases we bimodal temperature characterized by hypothermia, normothermia...
Purpose: To compare the clinical performance of TECNIS Synergy multifocal (model ZFR00V) intraocular lens (IOL) with that AcrySof PanOptix Trifocal TFNT00) IOL in patients undergoing bilateral cataract surgery. Setting: Multicenter setting. Design: Prospective randomized comparative study. Methods: Patients aged 22 years or older were randomly assigned (2:1) to implantation ZFR00V TFNT00 IOLs. End points included mean binocular distance-corrected near visual acuity (DCNVA) at 40 cm, photopic...
To evaluate the efficacy, predictability, and safety of coaxial microincision phacoemulsification toric intraocular lens (IOL) implantation in eyes with high corneal astigmatism.Two eye clinics Germany.Case series.Routine cataract extraction using 2.2 mm phaco equipment Acrysof IOL (3.00 to 6.00 diopters [D] cylinder) were performed. Examinations included optical biometry, Haigis calculation, topography, objective subjective refractions. Retroillumination images used alignment. Postoperative...
PURPOSE: To evaluate the influencing factors on remaining astigmatism after implanting a toric intraocular lens during cataract surgery. METHODS: In this observational study, consecutive patients with from three different centers who received lenses were included. Keratometry was performed an optical biometry device preoperatively. The IOLMaster 500 (Carl Zeiss Meditec AG, Jena, Germany) used in Vienna, Lenstar (Haag-Streit, Köniz, Switzerland) Castrop-Rauxel, and AG) London. Partial least...
Abstract. The "Scandinavian Triangle" is a unique trio of radars within the DATAR Project (Dynamics and Temperatures from Arctic MLT (60–97km) region): Andenes MF radar (69°N, 16°E); Tromsø (70°N, 19°E) Esrange "Meteor" (68°N, 21°E). radar-spacings range 125-270km, making it for studies wind variability associated with small-scale waves, comparisons large-scale waves measured over small spacings, winds different systems. As such complements results arrays having spacings 25km 500km that have...
PURPOSE: To quantify the current accuracy limits, analyze residual errors, and propose next steps for prediction improvements. SETTING: Eye hospitals in Germany, Denmark, Austria. METHOD: Numerical ray tracing using manufacturer's intraocular lens (IOL) data (vertex radii, central thickness, refractive index) was used all calculations. Postoperative position predicted by a simple scaling model based on measurements 1 patient collective. The compared with 2 other approaches collectives at...
Rocket‐borne observations of meteoric smoke particles (MSPs) are presented from three campaigns at polar latitudes (69°N) in September 2006, and the summers 2007 2008. MSPs detected using a novel technique based on photoelectron emission after stimulation by UV photons emitted xenon flashlamp. Resulting currents shown to be proportional particle volume density. results match model predictions qualitatively altitudes 65 85 km while measurements higher contaminated photoelectrons NO O 2 ( 1 Δ...
To quantify the impact of posterior cornea on toric IOL calculation accuracy using Placido-topography anterior corneal surface and Scheimpflug measurements thickness.Three-hundred seventy-nine non-selected eyes undergoing cataract surgery with non-toric intraocular lens (IOL) implantation were measured TMS-5 (Tomey, Japan), IOLMaster (Zeiss, Germany) Lenstar (Haag-Streit, Switzerland). Anterior, total astigmatisms compared from postoperative refraction by calculating vector differences.The...