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Investigation of the porous drag and permeability at the porous-fluid interface: Influence of the filtering parameters on Darcy closure

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Particuology 2023年第7期78卷 122-135页

作者： Wojciech sadowski Francesca di Mare Chair of Thermal Turbomachines and Aeroengines Department of Mechanical EngineeringRuhr University BochumUniversitatsstr.15044801Germany

The porous-fluid interface encompasses a region bridging the flow inside a porous medium and a free-flowing *** the context of volume-averaged simulations,it can be described by a set of gradually changing parameters defining the porous medium,mainly porosity and *** this paper,both the permeability and the porous-induced drag force are evaluated a-priori,by explicitly filtering a set of Particle-Resolved Simulations(PRS)of the flow in the channel partially occupied by the porous *** porous matrices are considered and the influence of the geometry and filtering parameters on the macroscopic quantities is ***,the focus is placed on the requirements for the kernel type and size to perform filtering accurately,and their impact on the distribution of permeability at the *** performance of the typically used models for the permeability is compared to the explicitly filtered ***,a new model for permeability and the drag force is introduced,taking into account the information about the fltering size and non-uniformity of the velocity *** model greatly improves the prediction of velocity at the porous-fluid interface and serves as a proof of concept that a successful porous drag model should strive to include information about both parameters.

关键词： Porous-fluid interface Explicit filtering Permeability Porous drag

Gene Networks in Plant Ozone Stress Response and Tolerance

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Journal of Integrative Plant Biology 2008年第10期50卷 1256-1267页

作者： Agnieszka Ludwikow Jan sadowski Department of Biotechnology Institute of Molecular Biology and Biotechnology Faculty of Biology Adam Mickiewicz University Miedzychodzka 5 60-371 Poznan Poland Institute of Plant Genetics Polish Academy of Sciences Strzeszynska 34 60-479 Poznan Poland

For many plant species ozone stress has become much more severe in the last decade. The accumulating evidence for the significant effects of ozone pollutant on crop and forest yield situate ozone as one of the most important environmental stress factors that limits plant productivity worldwide. Today, transcriptomic approaches seem to give the best coverage of genome level responses. Therefore, microarray serves as an invaluable tool for global gene expression analyses, unravelling new information about gene pathways, in-species and cross-species gene expression comparison, and for the characterization of unknown relationships between genes. In this review we summarize the recent progress in the transcriptomics of ozone to demonstrate the benefits that can be harvested from the application of integrative and systematic analytical approaches to study ozone stress response. We focused our consideration on microarray analyses identifying gene networks responsible for response and tolerance to elevated ozone concentration. From these analyses it is now possible to notice how plant ozone defense responses depend on the interplay between many complex signaling pathways and metabolite signals.

关键词： crosstalk interactions gene network microarray ozone stress signaling.

Tensile and tear-type fracture toughness of gypsum material:Direct and indirect testing methods

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Journal of Rock Mechanics and Geotechnical Engineering 2023年第7期15卷 1777-1796页

作者： Daniel Pietras M.R.M.Aliha Hadi G.Kucheki Tomasz sadowski Lublin University of Technology Civil Engineering and architecture departmentNadbystrzycka 40 str20-618LublinPoland Welding and Joining Research Center School of Industrial EngineeringIran University of Science and Technology(IUST)Narmak16846-13114TehranIran

In this context,four specimens,i.e.(i)circumferentially notched cylindrical torsion(CNCT),(ii)circum-ferentially notched cylindrical direct tension(CNCDT),(iii)edge notch disc bend(ENDB)and(iv)three-point bend beam(3PBB),were utilized to measure the modesⅠandⅢfracture toughness values of *** the CNCT specimen provides pure modeⅢloading in a direct manner,this pure mode condition is indirectly produced by the ENDB *** ENDB specimen provided lower KⅢc and a non-coplanar(***)fracture surface compared with the CNCT specimen,which showed a planar modeⅢfracture *** ENDB specimen is also employed for conducting pure modeⅠ(with different crack depths)and mixed modeⅠ/Ⅲ*** value was independent of the notch depth,and it was consistent with the RILEM and ASTM standard *** the modeⅢfracture results were highly sensitive to the notch *** the fracture resistance against modeⅢwas significantly lower than that of modeⅠ,the greater work of fracture under modeⅢwas noticeable.

关键词： Gypsum Pure modesⅠandⅢfracture toughness Mixed modeⅠ/Ⅲ Circumferentially notched cylindrical torsion(CNCT)specimen Circumferentially notched cylindrical direct tension(CNCDT)specimen Edge notch disc bend(ENDB)specimen Experimental measurement Geometry and loading type effects

Effects of Rhodiola rosea supplementation on mental performance,physical capacity,and oxidative stress biomarkers in healthy men

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Journal of Sport and Health Science 2018年第4期7卷 473-480页

作者： Ewa Jòwko Jerzy sadowski Barbara Dlugolecka Dariusz Gierczuk Benedykt Opaszowski Igor Cieslinski Department of Physiology and Biochemistry Faculty of Physical Education and Sport in Biala PodlaskaJòzef Pitsudski University of Physical Education in WarsawBiala Podlaska 21-500Poland Faculty of Physical Education and Sport in Biala Podlaska Jòzef Pilsudski University of Physical Education in WarsawBiala Podlaska 21-500Poland Department of Endocrinology Institute of Sport in WarsawWarsaw 01-982Poland Corresponding author.E-mail address：ewa.jowko@awf-bp.edu.pl

Purpose： The objective of this study was to investigate the effects of chronic Rhodiola rosea （R. rosea） supplementation on mental and physical performance, as well as hormonal and oxidative stress biomarkers. Methods： Twenty-six healthy male students received either R. rosea extract （600 mg/day; RR） or placebo （PL） in a randomized double-blind trial. Prior to supplementation （Term I） and following 4 weeks of supplementation （Term II）, the students underwent psychomotor tests for simple and choice reaction time, included in the Vienna Test System. Also, the subjects performed VO2peak test. Blood samples were obtained before and after the test to measure the hormonal profile （cortisol, testosterone, and growth hormone）, as well as the biomarkers of oxidative stress （lipid hydroperoxides, total antioxidant capacity, and superoxide dismutase） and muscle damage （creatine kinase）. Results： R. rosea ingestion shortened reaction time and total response time. Moreover, a greater relative increase in the number of correct responses was observed in RR group as compared to the PL group. No changes in endurance exercise capacity and hormonal profile were observed after R. rosea ingestion. R. rosea ingestion raised plasma total antioxidant capacity. It did not, however, affect other measured parameters. Conclusion： Chronic R. rosea ingestion does not affect physical performance, but can improve the results of some psychomotor tests （simple and choice reaction time） in young, healthy, and physically active men. The improvements in mental performance, however, at least in our study, seem not to be related to changes in cortisol release or antioxidant activity of R. rosea extract. Thus, the specific mechanisms responsible for these effects still need to be elucidated.2018 Published by Elsevier B.V. on behalf of Shanghai University of Sport. This is an open access article under the CC BY-NC-ND license. （http：//***/licenses/by-nc-nd/4.0/）.

关键词： Cortisol Endurance capacity Incremental exercise Men Oxidative stress Simple and choice reaction time Testosterone

考虑技术体制和需求结构下破坏性创新与产业演化

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系统管理学报 2019年第3期28卷 485-493,509页

作者：郁培丽石俊国 Bert sadowski 向涛东北大学工商管理学院沈阳110819 江苏大学财经学院江苏镇江212013 埃因霍温理工大学创新科学学院荷兰埃因霍温5600MB

通过构建考虑技术体制与需求结构下破坏性创新与产业演化多主体仿真模型,考察技术体制与需求结构在破坏性创新驱动产业演化中的作用。研究发现,随着技术机会不断增加、专有性不断下降,市场结构趋于竞争,破坏性创新对市场的颠覆程度更高... 详细信息

通过构建考虑技术体制与需求结构下破坏性创新与产业演化多主体仿真模型,考察技术体制与需求结构在破坏性创新驱动产业演化中的作用。研究发现,随着技术机会不断增加、专有性不断下降,市场结构趋于竞争,破坏性创新对市场的颠覆程度更高,在位企业存活数目和市场份额不断减少,企业的平均年龄不断下降。并且,在需求异质性较高的市场,破坏性创新对产业演化的影响更加显著。

关键词：破坏性创新产业演化技术体制需求结构

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开放式创新网络形成及演化的探索性案例研究

科研管理 2014年第8期35卷 51-58页

作者：彭华涛 Bert sadowski 武汉理工大学管理学院湖北武汉430070 埃因霍芬理工大学创新科学学院

企业如何在战略阶段演进中构建与战略网络与商业生态系统相互融合与共同演化的开放式创新网络,已成为开放式创新能否取得成效的关键。本文揭示了开放式创新网络与战略网络、商业生态系统的关联性及内在逻辑,运用探索性案例研究方法,以"... 详细信息

企业如何在战略阶段演进中构建与战略网络与商业生态系统相互融合与共同演化的开放式创新网络,已成为开放式创新能否取得成效的关键。本文揭示了开放式创新网络与战略网络、商业生态系统的关联性及内在逻辑,运用探索性案例研究方法,以"每20分钟产生一项专利"的荷兰埃因霍芬高科技园区为研究对象,将园区开放式创新网络形成及演化3阶段的开放式创新网络概括为"1+0"、"1+N"、"N+N"3种形式,得出开放式创新网络的形成及演化取决于战略网络的类型和动态变化趋势以及商业生态系统中核心物种的生态位进化。

关键词：开放式创新网络埃因霍芬高科技园区探索性案例研究

X-Ray and Corpuscular Emission from Hot-Spots in Plasma-Focus Discharges

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中国核科技报告 1999年第S4期 371-372页

作者： L.Jakubowski,M.sadowski Department of Plasma Physics ＆ Technology(P-V)The Andrzej Soltan Institute for Nuclear Studies(IPJ) 05-400 Otwock-Swierk by Warsaw Poland Department of Plasma Physics ＆ Technology(P-V)The Andrzej Soltan Institute for Nuclear Studies(IPJ) 05-400 Otwock-Swierk by Warsaw Poland

A dense magnetized plasma, as produced by high-current discharges of the Plasma-Focus (PF) type, can form locally very small (tiny) regions-so called "hotspots"-characterized by extreme values of basic parameters. Wit... 详细信息

关键词： X-Ray and Corpuscular Emission from Hot-Spots in Plasma-Focus Discharges high

Electrokinetic and Flotation Investigations of Surface Properties Modification of Magnesite and Serpentinite Using Biosurfactants and Surfactants

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Journal of Physical Science and Application 2015年第2期5卷 87-95页

作者： Agnieszka Didyk-Mucha Izabela Polowczyk Zygmunt sadowski Jan Kudelko Chemical Engineering Department Wroclaw University of Technology Wroclaw 50-370 Poland Geoengineering Mining and Geology Department Wroclaw University of Technology Wroclaw 50-370 Poland

This paper presents some results of zeta potential measurements performed into biosurfactant adsorption onto magnesite and serpentinite surface. Zeta potential and isoelectric point measurement of magnesite and serpentinite particles before and after interaction with biosurfactant broth solution and activator （nickel（II） ion solution） were carried out. The zeta potential results show that presence of biosurfactants changes both magnesite and serpentinite surface potential by physical adsorption which increases the hydrophobicity of mineral particles. Measurements of particles zeta potential in the presence of biosurfactant broth are relevant to the minerals flotation. Hallimod flotation response of magnesite and serpentinite as a function of collector concentration was investigated. Bioflotation test results show that at the presence of broth, the flotation separation of magnesite from serpentinite is possible.

关键词： Zeta potential adsorption bioflotation biosurfactant activation serpentinite magnesite.

增施氮肥和地面管理对酸樱桃园土壤营养状况的影响

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果树科学 2000年第1期17卷 27-30页

作者：杨朝选 Andrzej sadowski Ewa Jadczuk 中国农业科学院郑州果树研究所河南郑州450009 波兰华沙农业大学果树系

在一个连续进行了８年Ｎ肥定位试验的酸樱桃园，调查了每年施用Ｎ６０ｋｇ· ｈｍ^(－２)和行间生草制对土壤营养状况的影响。结果表明：在肥沃土壤里ＮＨ_４~＋是速效Ｎ的主要存在形式，而ＮＯ_３~－的含量很低。生草地土壤中含有... 详细信息

在一个连续进行了８年Ｎ肥定位试验的酸樱桃园，调查了每年施用Ｎ６０ｋｇ· ｈｍ^(－２)和行间生草制对土壤营养状况的影响。结果表明：在肥沃土壤里ＮＨ_４~＋是速效Ｎ的主要存在形式，而ＮＯ_３~－的含量很低。生草地土壤中含有较多的ＮＨ_４~－，而清耕带土壤中含有较多的ＮＯ_３~－。施肥增加土壤速效Ｎ的含量。土壤ＮＯ_３~－的季节性变化表明５至６月份土壤中ＮＯ_３~－的含量高，而花前和７月份土壤中ＮＯ_３~－含量低。Ｐ、Ｋ在清耕带１０ｃｍ以下土壤的含量低于生草地土壤，但在０～１０ｃｍ土层中Ｋ的含量高于生草地。Ｐ的含量不受影响。施Ｎ减少了土壤Ｐ、Ｋ的含量。土壤中Ｍｇ的含量分布均匀，不受施Ｎ和地面管理制度的影响。

关键词：土壤营养成分果园生草酸樱桃氮肥樱桃