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World Journal of Gastroenterology 2013年第45期19卷 8321-8325页

作者： dariusz szymanski Adam Durczynski Michal Nowicki Janusz Strzelczyk Department of General and Transplant Surgery Barlicki University Hospital Medical University of Lodz 0-153 Lodz Poland

AIM:To evaluate the use of the Roux loop on the postoperative course in patients submitted for gastroenteroanastomosis(GE).METHODS:Non-jaundiced patients(n=41)operated on in the Department of General and Transplant Surgery in Lodz,between January 2010 and December 2011 were *** tumor was considered unresectable when liver metastases or major vascular involvement were *** were randomized to receive Roux(n=21)or conventional GE(n=20)on a prophylactic ***:The mean time to nasogastric tube withdrawal in Roux GE group was shorter(1.4±0.75 vs2.8±1.1,P<0.001).Time to starting oral liquids,soft diet and regular diet were decreased(2.3±0.86 vs 3.45±1.19;P<0.001;3.3±0.73 vs 4.4±1.23,P<0.001and 4.5±0.76 vs 5.6±1.42,P=0.002;respectively).The Roux GE group had a lower use of prokinetics(10mg thrice daily for 2.2±1.8 d vs 3.7±2.6 d,P=0.044;total 62±49 mg vs 111±79 mg,P=0.025).The mean hospitalization time following Roux GE was shorter(7.7 d vs 9.6 d,P=0.006).Delayed gastric emptying(DGE)was confirmed in 20%after conventional GE but in none of the patients following Roux ***:Roux gastrojejunostomy during open abdomen exploration in patients with unresectable pancreatic cancer is easy to perform,decreases the incidence of DGE and lowers hospitalization time.

关键词： Unresectable pancreatic cancer Roux and conventional gastroeneteroanastomosis Gastroenteroanastomosis Delayed gastric emptying Hospital length of stay

Preoperative high level of D-dimers predicts unresectability of pancreatic head cancer

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World Journal of Gastroenterology 2014年第36期20卷 13167-13171页

作者： Adam Durczynski Anna Kumor Piotr Hogendorf dariusz szymanski Piotr Grzelak Janusz Strzelczyk Department of General and Transplant Surgery Medical University of Lodz 90-153 Lodz Poland Department of Allergology and Pulmonary Diseases Medical University of Lodz 90-153 Lodz Poland Department of Radiology and Diagnostic Imaging Medical University of Lodz 90-153 Lodz Poland

AIM: To assess the value of D-dimer level in determining resectability of pancreatic cancer.

关键词： Pancreatic cancer D-dimers Portal blood Peripheral blood Bile Urine Pancreatic cancer respectability

Real prospects for the development of power technologies based on renewable energy sources in Poland

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Frontiers in Energy 2017年第2期11卷 168-174页

作者： Slawomir DYKAS Artur szymanski Xiaoshu CAI Silesian University of Technology Institute of Power Engineering andTurbomachinery Konarskiego 20 44-100 Gliwice Poland Institute of Particle and Two-Phase Flow Measurement University ofShanghai for Science and Technology Shanghai 200093 China

In Poland more than 40% of the power units have been operating for over 40 years now and more than 10% are over 50 years old, which indicates a high degree of decrease in the value of the energy sector. An analysis of the energy market shows that every year a new power plant should be built with a capacity of 1000 MW to ensure the national energy security. An energy market research indicates that in Poland the structure of energy production is changing in recent years-the share of fossil (solid) fuels in electricity and heat production was approximately 88% in 2009, while in 2004 it reached 93%. According to the analysis of the market, it can be seen that conventional energy, mainly based on coal and lignite, has been the most important segment of the sector for a long time. In this paper the prospects for the development of power technologies based on renewable energy sources (RES) in Poland are presented.

关键词： renewable energy sources energy sector energy mix Poland

Fever of unknown origin:a retrospective review of pediatric patients from an urban,tertiary care center in Washington,DC

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World Journal of Pediatrics 2020年第2期16卷 177-184页

作者： Ann Marie szymanski Hugo Clifford Tova Ronis Division of Pediatric Rheumatology Children's National Health SystemWashingtonDCUSA National Institute of Arthritis and Musculoskeletal and Skin Diseases National Institutes of HealthBuilding 10Rm 12S251 MSC 156010 Center DriveBethesdaMD 20814USA The School of Medicine and Health Sciences The George Washington UniversityWashingtonDCUSA

Background Fever of unknown origin(FUO)continues to challenge clinicians to determine an etiology and the need for *** study explored the most common etiologies,characteristics,and average cost of hospitalization for FUO in a pediatric population at an urban,tertiary care hospital in Washington,*** Records from patients admitted to Children's National Health System between September 2008 and April 2014 with an admission ICD-9 code for fever(780.6)were *** charts of patients 2-18 years of age with no underlying diagnosis and a temperature greater than 38.3℃for 7 days or more at time of hospitalization were *** diagnoses,features of admission,and total hospital charges were *** 110 patients qualified for this *** majority of patients(n=42,38.2%)were discharged without a *** was followed closely by infection,accounting for 37.2%(n=41)of *** disease was next(n=16,14.5%),followed by miscellaneous(n=6,5.4%)and oncologic diagnoses(n=5,4.5%).The average cost of hospitalization was 40,295 US *** This study aligns with some of the most recent publications which report undiagnosed cases as the most common outcome in patients hospitalized with *** that,often no diagnosis is found may reassure patients,families,and *** cost associated with hospitalization for FUO may cause clinicians to reconsider inpatient admission for diagnostic work-up of fever,particularly given the evidence demonstrating that many patients are discharged without a diagnosis.

关键词： Fever Fever of unknown origin Infection Healthcare costs

Distribution, Morphology, and Chemical Composition of Fe-Mn Nodules in Albeluvisols of the Carpathian Foothills, Poland

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Pedosphere 2013年第4期23卷 445-454页

作者： W.szymanski M.SKIBA Department of Pedology and Soil Geography Institute of Geography and Spatial Management Jagiellonian University Department of Mineralogy Petrology and Geochemistry Institute of Geological Sciences Jagiellonian University

Iron and manganese oxides are common components of soils. They frequently occur in nodules constituting important soil sorbents and play a crucial role in a number of chemical reactions in the soil environment. In addition, the oxides are very sensitive to environmental changes (moisture, pH, Eh) constituting important indicators of soil-forming processes and water movement in the landscape. The objectives of the study were: i) to examine the distribution and size of Fe-Mn nodules in Albeluvisols containing a fragipan horizon; ii) to determine the morphology and chemical composition of the nodules, and iii) to estimate the effect of the fragipan horizon on water movement within the soil profile. An investigation was carried out on five soil profiles containing a fragipan horizon and classified as Fragic Albeluvisols within the Carpathian Foothills in Poland. In the Albeluvisols studied, the maximum concentration of Fe-Mn nodules occurred in the horizon lying directly on the fragipan horizon. This suggests that the pan acts as a natural barrier restricting water infiltration and leads to the seasonal development of a perched water table promoting redox processes. The most common are coarse (1-0.5 mm) and medium (0.5-0.25 mm) irregular Fe-Mn nodules showing a gradual boundary and undifferentiated internal fabric. Eluvial horizons contained also larger amounts of round and dense nodules with a sharp boundary, suggesting frequent oxidation and reduction. The fragipan horizon contained mainly irregular and soft nodules, suggesting longer saturation with water during the year. Concentrations of trace elements (Cu, Zn) and P were higher within Fe-Mn nodules than in the surrounding soil materials, showing that iron and manganese oxides adsorbed and immobilised these elements.

关键词： fragipan horizon iron oxides manganese oxides perched water table redox processes

Validating neural networks for spectroscopic classification on a universal synthetic dataset

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npj Computational Materials 2023年第1期9卷 1325-1336页

作者： Jan Schuetzke Nathan J.szymanski Markus Reischl Institute for Automation and Applied Informatics Karlsruhe Institute of TechnologyKarlsruhe 76131Germany Department of Materials Science&Engineering Lawrence Berkeley National LaboratoryBerkeleyCA 94720USA Department of Materials Science&Engineering UC BerkeleyBerkeleyCA 94720USA

To aid the development of machine learning models for automated spectroscopic data classification,we created a universal synthetic dataset for the validation of their *** dataset mimics the characteristic appearance of experimental measurements from techniques such as X-ray diffraction,nuclear magnetic resonance,and Raman spectroscopy among *** applied eight neural network architectures to classify artificial spectra,evaluating their ability to handle common experimental *** all models achieved over 98%accuracy on the synthetic dataset,misclassifications occurred when spectra had overlapping peaks or *** found that non-linear activation functions,specifically ReLU in the fully-connected layers,were crucial for distinguishing between these classes,while adding more sophisticated components,such as residual blocks or normalization layers,provided no performance *** on these findings,we summarize key design principles for neural networks in spectroscopic data classification and publicly share all scripts used in this study.

关键词： spectroscopic adding classify

From micro-to nanosized particles:Selected characterization methods and measurable parameters

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Particuology 2011年第3期9卷 193-203页

作者： Nayla Sabbagh-Kupelwieser Anne Maisser Wladyslaw W.szymanski Faculty of Physics Aerosol Physics and Environmental Physics DivisionUniversity of Vienna

Airborne micro- and nanoparticles-aerosols - play an important role in many natural phenomena and in a variety of industrial processes, as well as the public health issue. They may be of natural or anthropogenic origin; their presence in an environment might be intentional or due to undesirable release. In any case, merely the particle detection and characterization, ideally in real-time, provide an insight into the potential burden allowing also controlling and abatement measures. Due to the broad size range it is not possible to characterize the entire particle spectrum with only one method. This contribution discusses selected optical techniques based on elastic light scattering, which are suitable for characterization of micrometer sized particles and particular electrical techniques allowing measurement of nanoparticles. It is shown that combination of instruments measuring different properties of the same nanoparticles offers derivative parameters contributing to more complete characterization of aerosols

关键词： Aerosol Nanoparticles Light scattering Electrical mobility Particle sizing PM-fractions

Deliberation between PM1 and PM2.5 as air quality indicators based on comprehensive characterization of urban aerosols in Bangkok, Thailand

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Particuology 2017年第6期15卷 1-9页

作者： Issariya Vejpongsa Sirikalaya Suvachittanont Natsucla Klinklan Thunyapat Thongyen Miklos Veres Wladyslaw W. szymanski Department of Chemical Engineering Kasetsart University Bangkok Thailand Kasetsart University Bangkok Thailand Wigner Centre for Physics of the Hungarian Academy of Sciences Budapest Hungary Faculty of Physics University of Vienna Vienna Austria

Urban ambient aerosols in the size range below 10 μm were measured and sampled for further evalua- tion （by Raman and Thermal-Optical analysis） of the collected material. The presented data shows that monitoring number and/or surface area concentrations besides the mass concentration provides valu- able information for a meaningful assessment of the actual ambient air quality. The aim of the study was to characterize the urban aerosols using various instruments, methods, and sampling conditions, and to determine whether a split of the PMzs size fraction at PM1 may deliver a more sensible indication of the actual air quality than the current standard of monitoring PMzs. We found substantial differences relating to this split. PM2.5 data frequently include particles from both mechanical and combustion processes, PM1 measurements can be used to better distinguish particles derived from these two sources. We measured number concentrations of PM1 with PM2.5-1 concurrently with particle mass concentration and found that the typical average particle diameter by mass in the urban aerosols investigated was in the range of 120 nm; this corresponded well with the particle number size distributions measured in real time. Raman spectral analysis and thermal-optical evaluation of the sampled material also suggested that it would be sensible to split the measurement of the PM2.5 fraction into PM1 and PM2.s-1 size fractions, especially for analysis of carbonaceous aerosol components using the DRI thermal/optical reflectance carbon analysis system

关键词： Urban aerosol PM-ffactions Carbonaceous particles Raman spectroscopy Thermal-optical analysis

Unicentric Castleman's disease of the pancreas with massive central calcification

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World Journal of Gastroenterology 2005年第42期11卷 6725-6727页

作者： Oliver Goetze Matthias Banasch Klaus Junker Wolfgang E.Schmidt Christian szymanski Department of Medicine St. Josef-Hospital Ruhr-University Bochum Germany Institute of Pathology Bergmannsheil University Hospital Ruhr-University Bochum Germany Christian szymanski Department of Medicine St. Josef-Hospital Ruhr-University Bochum Germany

Unicentric Castleman＇s disease of the pancreas is extremely rare, with only six cases described in the worldwide literature. An asymptomatic case of unicentric, hyaline, vascular-type Castleman＇s disease （UCD） localized to the tail of bhe pancreas with central calcification imitating a primary neoplasm of the pancreas is presented. This is the first description of endosonographic and endoscopic retrograde pancreatographic findings of pancreatic UCD. Additionally, computed tomography, histological and serologic findings are reported.

关键词： Unicentric Castleman's disease Calcification Pancreas Endoscopic ultrasound

Adaptively driven X-ray diffraction guided by machine learning for autonomous phase identification

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npj Computational Materials 2023年第1期9卷 2036-2043页

作者： Nathan J.szymanski Christopher J.Bartel Yan Zeng Mouhamad Diallo Haegyeom Kim Gerbrand Ceder Department of Materials Science&Engineering UC BerkeleyBerkeleyCA 94720USA Materials Sciences Division Lawrence Berkeley National LaboratoryBerkeleyCA 94720USA

Machine learning(ML)has become a valuable tool to assist and improve materials characterization,enabling automated interpretation of experimental results with techniques such as X-ray diffraction(XRD)and electron *** ML models are fast once trained,there is a key opportunity to bring interpretation in-line with experiments and make on-the-fly decisions to achieve optimal measurement effectiveness,which creates broad opportunities for rapid learning and information extraction from ***,we demonstrate such a capability with the development of autonomous and adaptive *** coupling an ML algorithm with a physical diffractometer,this method integrates diffraction and analysis such that early experimental information is leveraged to steer measurements toward features that improve the confidence of a model trained to identify crystalline *** validate the effectiveness of an adaptive approach by showing that ML-driven XRD can accurately detect trace amounts of materials in multi-phase mixtures with short measurement *** improved speed of phase detection also enables in situ identification of short-lived intermediate phases formed during solid-state reactions using a standard in-house *** findings showcase the advantages of in-line ML for materials characterization and point to the possibility of more general approaches for adaptive experimentation.

关键词： phase diffraction autonomous