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Mature stand developmental stage has ceased to constitute the most suitable habitat for the capercaillie in the Augustow Forest,Poland

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Forest Ecosystems 2021年第4期8卷 685-698页

作者： Stanisław Drozdowski Dorota Zawadzka Grzegorz Zawadzki Marcin Studnicki bogdan Brzeziecki Institute of Forest Sciences Warsaw University of Life SciencesNowoursynowska 15902-776 WarszawaPoland Department of Forest Sciences University of LodzBranch in Tomaszow MazowieckiKonstytucji 3 Maja 65/6797-200 Tomaszow MazowieckiPoland Institute of Agriculture Warsaw University of Life SciencesNowoursynowska 15902-776 WarszawaPoland

Background:Forest management affects the habitat conditions for many forest-dwelling *** them,the capercaillie(Tetrao urogallus)is a rare forest grouse inhabiting old,mature *** compared the structure of forest habitat among 9 active and 9 abandoned leks in the Augustow Forest(North-Eastern Poland),within a radius of 1 km of the leks,defined as the Key Areas for the capercaillie in lowland temperate *** measurements were conducted on 1779 circular *** made on all plots related to 13 habitat variables measured or noted in the field,including stand structure,canopy closure,stand developmental stage,percentage of Scots pine(Pinus sylvestris),soil fertility and soil moisture,the share of undergrowth,the cover of shrubs,the cover of bilberry(Vaccinium sp.),and the presence of certain habitat elements important to the ***:To compare the still-occupied and the abandoned KAs for the capercaillie,a logistic regression model was *** variables best explaining differences between these two categories were:the occurrence of undergrowth layers,canopy closure in the second canopy layer,and stand *** to the model,with the increase of the shrub-layer cover as well as the density of trees,the probability of the presence of the capercaillie *** capercaillie in the area of the Augustow Forest occupy mainly dry and poor,middle-aged,pinedominated forests,with a moderate extent of stand canopy closure and only weakly-developed layers of ***:The filling-in of mature stands with sub-canopy trees and shrubs(the process which is stimulated by climate change and site eutrophication)causes structural changes,which are unfavourable to the *** might explain why in the course of the recent decades the capercaillie has abandoned the oldest stands,distinguished by the presence of bigger shares of *** capercaillie has shifted to younger stands,which reveal a lesser ex

关键词： Habitat suitability Lek occupancy Logistic regression Lowland forest Stand structure Tetrao urogallus

Pseudo-Depth/Intercept-Time Monotonicity Requirements in the Inverse Scattering Algorithm for Predicting Internal Multiple Reflections

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Communications in Computational Physics 2009年第1期5卷 163-182页

作者： bogdan G.Nita Arthur B.Weglein Department of Mathematical Sciences Montclair State University1 Normal AvenueMontclairNJ 07043USA. Department of Physics University of Houston617 Science and Research Bldg.1HoustonTX 77004USA

In this paper we discuss the inverse scattering algorithm for predicting internal multiple reflections(reverberation artefacts),focusing our attention on the construction *** speaking,the algorithm combines amplitude and phase information of three different arrivals(sub-events)in the data set to predict one multiple *** three events are conditioned by a certain relation which requires that their pseudo-depths,defined as the depths of their turning points relative to the constant background velocity,satisfy a lower-higher-lower *** implicitly assumes a pseudo-depth monotonicity condition,i.e.,the relation between the actual depths and the pseudo-depths of any two sub-events is the *** study this relation in pseudo-depth and show that it is directly connected with a similar relation between the vertical or intercept times of the *** paper also provides the first multidimensional analysis of the algorithm(for a vertically varying acoustic model)with analytical *** show that the construction of internal multiples is performed in the plane waves domain and,as a consequence,the internal multiples with headwaves sub-events are also predicted by the *** we analyze the differences between the time monotonicity condition in vertical or intercept time and total travel time and show a 2D example which satisfies the former but not the *** we discuss one case in which the monotonicity condition is not satisfied by the sub-events of an internal multiple and discuss ways of lowering these restrictions and of expanding the algorithm to address these types of multiples.

关键词： Multiple reflections seismic imaging inverse scattering

Intelligent Manufacturing Systems in COVID‑19 Pandemic and Beyond:Framework and Impact Assessment

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Chinese Journal of Mechanical Engineering 2020年第4期33卷 1-5页

作者： Xingyu Li Baicun Wang Chao Liu Theodor Freiheit bogdan I.Epureanu Department of Mechanical Engineering University of MichiganAnn ArborMI 48109USA School of Engineering Cardiff UniversityCardiff CF243AAUK

Pandemics like COVID-19 have created a spreading and ever-higher healthy threat to the humans in the manufacturing system which incurs severe disruptions and complex issues to industrial *** intelligent manufacturing(IM)systems are promising to create a safe working environment by using the automated manufacturing assets which are monitored by the networked sensors and controlled by the intelligent decision-making *** relief of the production disruption by IM technologies facilitates the reconnection of the good and service flows in the network,which mitigates the severity of industrial chain *** this study,we create a novel intelligent manufacturing framework for the production recovery under the pandemic and build an assessment model to evaluate the impacts of the IM technologies on industrial *** the constraints of the IM resources,we formulate an optimization model to schedule the allocation of IM resources according to the mutual market demands and the severity of the pandemic.

关键词： Intelligent manufacturing system COVID-19 pandemic Industrial network Supply chain disruption Optimization

Thermoelastic Damping in Auxetic Plate

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Transactions of Nanjing University of Aeronautics and Astronautics 2014年第2期31卷 123-126页

作者： bogdan T.Maruszewski rzej Drzewiecki Roman Starosta Institute of Applied Mechanics Poznan University of Technology

The paper deals with the thermoelastic damping in a rectangular auxetic plate during its free and forced *** to existing descriptions the relaxation properties of the thermal field as well as the negative material(aux... 详细信息

关键词： thermoelastic damping auxetics thermal relaxation

The effect of the dietary inclusion of pea seeds of colored-flowered and white-flowered varieties on gastrointestinal function in turkeys

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Animal Nutrition 2022年第3期10卷 167-177页

作者： Zenon Zdunczyk Dariusz Mikulski Jan Jankowski bogdan A.Slominski Jerzy Juskiewicz Institute of Animal Reproduction and Food Research Polish Academy of SciencesOlsztyn 10-748Poland Department of Poultry Science and Apiculture University of Warmia and MazuryOlsztyn 10-718Poland Department of Animal Science University of ManitobaWinnipeg R3T 2N2Canada

This study investigated the effects of dietary replacement of soybean meal(SBM)with graded levels of pea seeds(PS)on the gastrointestinal function of *** of 2 pea varieties,a colored-flowered variety and a white-flowered variety(CFP and WFP,respectively)were fed to 56-d-old birds for 8 wk.A total of 539 female Hybrid turkeys were allocated to 7 groups,each group consisted of 7 pens with 11 birds per *** experiment had a 2-factorial design,with 3 dietary inclusion levels of PS(100,200 and 300 g/kg)and 2 pea varieties(CFP and WFP).The control group(diets without PS)was compared with CFP and WFP treatments by simple contrast *** comparison with CFP seeds,WFP seeds contained 7-fold less tannins(0.67 vs.4.66 g/kg)and less non-starch polysaccharides(NSP,117.8 vs.132.7 g/kg),but more trypsin inhibitors(1.34 vs.0.98 g/kg)and starch(489 vs.455 g/kg).A rise in the PS content of diets from 100 to 200 and 300 g/kg increased the weight of the small intestine(P=0.031)and the dry matter(DM)content of intestinal digesta(P=0.001),but it had no effect on the pH of *** the highest PS content differentiated the concentrations of short-chain fatty acids(SCFAs)in the small intestinal digesta(WFP>CFP,P=0.008),whereas PS did not cause any changes in the morphological parameters of the small intestinal *** dietary inclusion of PS had no influence on the levels of acetate,butyrate,putrefactive SCFAs or total SCFAs in the cecal *** from increasing the activities of b-glucosidase(P=0.017)and b-galactosidase(P=0.025),pea varieties did not affect the activities of the analyzed cecal microbial ***,CFP seeds decreased the DM content(P=0.041)and increased the pH of cecal digesta,compared with WFP seeds(P=0.013).The results of this study,pointing to a few differences in the functional parameters of the small intestine and cecum,indicate that tannins are not a factor differentiating the suitability of CFP and WFP seeds in the nutrition of f

关键词： Pea Tannin Growth performance Gastrointestinal tract Turkey

Evaluating data-driven algorithms for predicting mechanical properties with small datasets:A case study on gear steel hardenability

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International Journal of Minerals,Metallurgy and Materials 2022年第4期29卷 836-847页

作者： bogdan Nenchev Qing Tao Zihui Dong Chinnapat Panwisawas Haiyang Li Biao Tao Hongbiao Dong NISCO UK Research Centre School of EngineeringUniversity of LeicesterLeicester LE17RHUK Nanjing Iron&Steel United Co. Ltd.Nanjing 210044China

Data-driven algorithms for predicting mechanical properties with small datasets are evaluated in a case study on gear steel *** limitations of current data-driven algorithms and empirical models are *** in analysing small datasets are discussed,and solution is proposed to handle small datasets with multiple *** methods in combination with novel predictive algorithms are utilized to overcome the challenges in analysing gear steel hardenability data and to gain insight into alloying elements interaction and structure *** gained fundamental knowledge integrated with machine learning is shown to be superior to the empirical equations in predicting ***-property relationships between chemistry,sample size,and hardness are predicted via two optimized machine learning algorithms:neural networks(NNs)and extreme gradient boosting(XGboost).A comparison is drawn between all algorithms,evaluating their performance based on small data *** results reveal that XGboost has the highest potential for predicting hardenability using small datasets with class imbalance and large inhomogeneity issues.

关键词： machine learning small dataset XGboost hardenability gear steel

Quantification and pharmacokinetic study of tumor-targeting agent MHI148-clorgyline amide in mouse plasma using liquid chromatography-electrospray ionization tandem mass spectrometry

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Journal of Pharmaceutical Analysis 2018年第3期8卷 153-159页

作者： Zhijun Wang bogdan Z.Olenyuk Jean Chen Shih Jeffrey Wang Center for Advancement of Drug Research and Evaluation College of Pharmacy Western University of Health Sciences Department of Pharmaceutical Sciences College of Pharmacy Marshall B.Ketchum University Department of Pharmacology and Pharmaceutical Sciences School of Pharmacy Department of Cell and Neurobiology Keck School of Medicine USC-Taiwan Center for Translational Research University of Southern California Department of Pharmaceutical Sciences College of Pharmacy Western University of Health Sciences

A high-performance liquid chromatography-electrospray ionization tandem mass spectrometric （HPLC- ESI-MS/MS） method was developed for the quantification of MHl148-clorgyline amide （NMl-amide）, a novel tumor-targeting monoamine oxidase A inhibitor, in mouse plasma. The method was validated in terms of sensitivity, precision, accuracy, recovery and stability and then applied to a pharmacokinetic study of NMl-amide in mice following intravenous administration. NMl-amide together with the internal standard （IS）, MHI-148, was extracted by protein precipitation using acetonitrile. Multiple reaction monitoring was used for quantification of NMl-amide by detecting m/z transition of 491.2-361.9, and 685.3-258.2 for NMl-amide and the IS, respectively. The lower limit of quantification （LLOQ） of the HPLC- MS/MS method for NMl-amide was 0.005 μg/mL and the linear calibration curve was acquired with R2〉 0.99 in the concentration range of 0.005-2μg/mL. The intra- and inter-day precisions of the assay were assessed by percentage of the coefficient of variations, which was within 9.8% at LLOQ and 14.0% for other quality control samples, whereas the mean accuracy ranged from 86.8% to 113.2%. The samples were stable under storage and experimental conditions. This method was successfully applied to a pharmacokinetic study in mice following intravenous administration of 5 mg/kg NMl-amide.

关键词： MH1148-clorgyline HPLC Mass spectrometry Pharmacokinetics

High Impact Polylactide Based on Organosilicon Nucleation Agent

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Chinese Journal of Polymer Science 2024年第6期42卷 787-797页

作者： Daria Pakuła Bogna Sztorch Eliza Romańczuk-Ruszuk bogdan Marciniec Robert E.Przekop Faculty of Chemistry Adam Mickiewicz University in PoznańUniwersytetu Poznańskiego 861-614PoznańPoland Centre for Advanced Technologies Adam Mickiewicz University in PoznańUniwersytetu Poznańskiego 1061-614PoznańPoland Institute of Biomedical Engineering Faculty of Mechanical EngineeringBialystok University of TechnologyWiejska 45C15-351BialystokPoland

Various sectors of the industry are searching for new materials with specific requirements,providing improved *** study presents novel composite materials based on polylactide that have been modified with the organosilicon compound,(3-thiopropyl)polysilsesquioxane(SSQ-SH).The SSQ-SH compound is a mixture of cage structures and not fully condensed random *** composite materials were obtained through injection *** study includes a comprehensive characterization of the new materials that analyze their functional properties,such as rheology(MFR),mechanical strength(tensile strength,Charpy impact strength),and thermal *** microscopic photos were also taken to analyze the microstructure of the *** addition of a 5%by-weight organosilicon compound to polylactide resulted in a significant increase in MFR by 73.8%compared to the neat *** greatest improvement in impact strength was achieved for the 5%SSQ-SH/PLA composite,increasing it by 32.0 kJ/m^(2)compared to PLA,which represents an increase of up to 187%.The conducted research confirms the possibility of modifying the properties of the polymer by employing organosilicon compounds.

关键词： Octa(3-thiopropyl)silsesquioxane 8SH-POSS Polylactide(PLA) Injection moulding Composites

Geomechanical monitoring of rock's massive in zones of breaks

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中国有色金属学会会刊：英文版 2005年第S1期15卷 275-278页

作者： M. A. Zhuravkov S. I. bogdan M. A. Kovaleva Belarus State University Minsk 220050 BelarusBelarus State University Minsk 220050 BelarusBelarus State University Minsk 220050 Belarus

For safe development of underground space and especially in areas of geological infringements it is necessary to creat effective system of tracking, forecasting and management for deforming processes in such areas-system of geomechanical monitoring. Besides it is necessary to study and imagine the internal mechanism of deforming processes in such special zones. In the paper some basic aspects of creation of geomechanical monitoring systems for realization of supervision, study and modelling of deforming processes, for modelling and study of the stress-strain state of massif in areas of large-scale underground mining works in view of a block-hierarchical structure of rock’s massive (presence of geological infringements) are considered. In particular such important tasks, as research of deforming processes in areas of geological infringements with the help of GPS-technologies and use of the received results for the modeling; construction of models adequately describing a condition of rock’s massive in area of geological infringement. Some results of researches on study of cavities influence on occurrence of an area of limiting conditions in region of geological infringement and possible shift along infringement are submitted.

关键词： geological infringement shift displacement stress-strain state