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A statistical analysis of geomechanical data and its effect on rock mass numerical modeling:a case study

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International Journal of Coal Science & Technology 2021年第3期8卷 312-323页

作者： Piotr Malkowski zbigniew niedbalski Tafida Balarabe Faculty of Mining and Geoengineering AGH University of Science and Technologyal.Mickiewicza 3030-059 KrakówPoland Revoult Ltd al.Jana PawlaⅡ43a31-864 KrakówPoland

Geomechanical data are never sufficient in quantity or adequately precise and accurate for design purposes in mining and civil *** objective of this paper is to show the variability of rock properties at the sampled point in the roadway's roof,and then,how the statistical processing of the available geomechanical data can affect the results of numerical modelling of the roadway's *** cases were applied in the numerical analysis,using average values(the most common in geomechanical data analysis),average minus standard deviation,median,and average value minus statistical *** study show that different approach to the same geomechanical data set can change the modelling results *** case shows that average minus standard deviation is the most conservative and least *** gives the displacements and yielded elements zone in four times broader range comparing to the average values scenario,which is the least conservative *** two other cases need to be studied *** results obtained from them are placed between most favorable and most adverse *** the average values corrected by statistical error for the numerical analysis seems to be the best ***,the confidence level can be adjusted depending on the object importance and the assumed risk level.

关键词： Statistical analysis Geotechnical data Laboratory tests on rocks Numerical modelling

Rock mass movements around development workings in various density of standing-and-roof-bolting support

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Journal of Coal Science & Engineering(China) 2008年第3期14卷 356-360页

作者： MAJCHERCZYK Tadeusz MALKOWSKI Piotr niedbalski zbigniew Faculty of Mining and Geoengineering AGH University of Science and TechnologyKrakow 30059Poland

Presented measurement results of roof rocks and wall rock movements of un- derground development workings after their *** research was carried out in the coal mine workings with standing-and-roof bolting *** were various density of the support,so the aim of the special monitoring programme was to determine movement intensity of rock mass in the premises of the heading *** were four types of re- search did by the *** measured convergence,roof layers separation using tell- tales and sonic probes and load bearing of the headings' roofs by hydraulic dynamometers Evaluation of fracture zone around the heading and investigation the load zone caused by failed roof rocks may become a basement for the determination of support parameters of the *** combined system of standing support and roof bolting seems to be an essential for underground headings protection.

关键词：岩体开采稳定性煤炭开采开采方法

COP 28: Challenge of coping with climate crisis

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The Innovation 2024年第1期5卷 21-22页

作者： Tong Jiang Xiaojia He Buda Su Peni Hausia Havea Ke Wei zbigniew W.Kundzewicz Dong Liu Research Institute of Climatic and Environmental Governance/Institute for Disaster Risk Management School of Geographical ScienceNanjing University of Information Science&TechnologyNanjing 210044China The Administrative Center for China’s Agenda 21 Beijing 100038China Pacific Global Solution Nuku’alofaTongatapu 000676Tonga Centre for Monsoon System Research Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Department of Environmental Engineering and Mechanical Engineering Poznan University of Life Sciences60-637 PoznanPoland The Paper Shanghai United Media GroupShanghai 200040China

The 28th Conference of Parties(COP 28)of the United Nations Framework Convention on Climate Change(UNFCCC)is being held in Dubai,United Arab Emirates,from November 30 to December 12,2023,with the participation of over 160 world leaders(Figure 1).The tone of the COP 28 is set by the observation that,clearly,the nationally determined contributions related to CO_(2) emission reduction are not on track to curb the temperature rise as per the Paris *** order to hold the increase in global mean temperature to well below 2℃ above the pre-industrial level and to pursue efforts to limit the warming to 1.5℃,there is a need for ratcheting up ambition for near-term climate action.

关键词： Figure limit COP

Britanin–a beacon of hope against gastrointestinal tumors?

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World Journal of Clinical Oncology 2024年第4期15卷 523-530页

作者： Agnieszka Kajdanek Damian Kołat Lin-Yong Zhao Mateusz Kciuk zbigniew Pasieka Żaneta Kałuzińska-Kołat Department of Biomedicine and Experimental Surgery Medical University of LodzLodz 90-136LodzkiePoland Department of Functional Genomics Medical University of LodzLodz 90-752LodzkiePoland Department of General Surgery&Laboratory of Gastric Cancer State Key Laboratory of Biotherapy/Collaborative Innovation Center of Biotherapy and Cancer CenterWest China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina Gastric Cancer Center West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina Department of Molecular Biotechnology and Genetics University of LodzLodz 90-237LodzkiePoland

Britanin is a bioactive sesquiterpene lactone known for its potent anti-inflammatory and anti-oxidant *** also exhibits significant anti-tumor activity,suppressing tumor growth in vitro and in *** current body of research on Britanin includes thirty papers predominantly related to neoplasms,the majority of which are gastrointestinal tumors that have not been summarized *** drive academic debate,the present paper reviews the available research on Britanin in gastrointestinal *** also outlines novel research directions using data not directly concerned with the digestive system,but which could be adopted in future gastrointestinal *** was found to counteract liver,colorectal,pancreatic,and gastric tumors,by regulating proliferation,apoptosis,autophagy,immune response,migration,and *** confirmed in pancreatic,gastric,and liver cancer,its most commonly noted molecular effects include nuclear factor kappa B and B-cell lymphoma 2 downregulation,as well as Bcl-2-associated X protein ***,it has been found to induce the Akt kinase and Forkhead box O1 axis,activate the AMP-activated protein kinase pathway,elevate interleukin-2 and peroxisome proliferator-activated receptor-γlevels,reduce interleukin-10,as well as downregulate matrix metalloproteinase-9,Twist family bHLH transcription factor 1,and *** also inhibits Myc–HIF1αinteraction and programmed death ligand 1 transcription by interrupting the Ras/RAF/MEK/ERK pathway and mTOR/P70S6K/4EBP1 *** research should aim to unravel the link between Britanin and acetylcholinesterase,mast cells,osteolysis,and ischemia,as compelling data have been provided by studies outside the gastrointestinal *** the cytotoxicity of Britanin on noncancerous cells is significantly lower than that on tumor cells,while still being effective against the latter,further in-depth studies with the use of animal models are *** compound exhi

关键词： Britanin Sesquiterpene lactones Chemotherapeutics Gastrointestinal tumors In vitro In vivo

Revisiting the standards of cancer detection and therapy alongside their comparison to modern methods

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World Journal of Methodology 2024年第2期14卷 17-37页

作者： Piotr Gromek Zuzanna Senkowska Elzbieta Pluciennik zbigniew Pasieka Lin-Yong Zhao Adrianna Gielecinska Mateusz Kciuk Karol Klosinski Zaneta Kaluzinska-Kolat Damian Kolat Department of Functional Genomics Medical University of LodzLodz 90-752LodzkiePoland Department of Biomedicine and Experimental Surgery Medical University of LodzLodz 90-136LodzkiePoland Department of General Surgery&Laboratory of Gastric Cancer State Key Laboratory of Biotherapy/Collaborative Innovation Center of Biotherapy and Cancer CenterWest China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina Gastric Cancer Center West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina Department of Molecular Biotechnology and Genetics University of LodzLodz 90-237LodzkiePoland Doctoral School of Exact and Natural Sciences University of LodzLodz 90-237LodzkiePoland

In accordance with the World Health Organization data,cancer remains at the forefront of fatal *** upward trend in cancer incidence and mortality has been observed globally,emphasizing that efforts in developing detection and treatment methods should *** diagnostic path typically begins with learning the medical history of a patient;this is followed by basic blood tests and imaging tests to indicate where cancer may be located to schedule a needle *** initiation of diagnosis is crucial since delayed cancer detection entails higher costs of treatment and ***,there is a need for novel cancer detection methods such as liquid biopsy,elastography,synthetic biosensors,fluorescence imaging,and reflectance confocal *** therapeutic methods,although still common in clinical practice,pose many limitations and are ***,there is a dynamic advancement of clinical research and the development of more precise and effective methods such as oncolytic virotherapy,exosome-based therapy,nanotechnology,dendritic cells,chimeric antigen receptors,immune checkpoint inhibitors,natural product-based therapy,tumor-treating fields,and photodynamic *** present paper compares available data on conventional and modern methods of cancer detection and therapy to facilitate an understanding of this rapidly advancing field and its future *** evidenced,modern methods are not without drawbacks;there is still a need to develop new detection strategies and therapeutic approaches to improve sensitivity,specificity,safety,and ***,an appropriate route has been taken,as confirmed by the approval of some modern methods by the Food and Drug Administration.

关键词： Cancer detection Liquid biopsy Synthetic biosensors Fluorescence imaging Reflectance confocal microscopy Elastography Cancer therapy Tumor-treating fields Oncolytic virotherapy Nanotechnology

Twenty years of coal mining-induced subsidence in the Upper Silesia in Poland identified using InSAR

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International Journal of Coal Science & Technology 2022年第6期9卷 64-74页

作者： Maria Przylucka zbigniew Kowalski zbigniew Perski Polish Geological Institute-National Research Institute Geohazards CenterWarsawPoland Polish Geological Institute-National Research Institute Geohazards CenterCrakowPoland

The paper presents the results of terrain subsidence monitoring in Poland's Upper Silesian Coal Basin(USCB)mining area using Differential Interferometry Synthetic Aperture Radar(DInSAR)and Persistent Scatterer Interferometry(PSI).The study area accounts for almost three million inhabitants where mining which started in the 19th century,has produced severe damage to buildings and urban infrastructures in past *** analysis aimed to combine eight different datasets,processed in two techniques,coming from various sensors and covering different *** a result,a map of areas that have been exposed to subsidence within 3045 square kilometers was *** map covers a period of twenty years of intensive mining activities,i.e.1992-2012.A total of 81 interferograms were used in the *** interferograms allowed not only to determine subsidence troughs(basins)formed from 1992 to 2012 but also to observe subsidence development over *** work also included five sets of PSI processing,covering different temporal and spatial ranges,which were used to determine zones of residual *** on InSAR datasets,an area of 521 square kilometers under the influence of mining activities were *** the subsiding zones,an area of 312.5 square kilometers of the rapid increase in subsidence was identified on the *** study of combined different InSAR datasets provided large-area and long-term information on the impact of mining activities in the Upper Silesia Coal Basin.

关键词： Surface subsidence Mining subsidence InSAR Ground subsidence monitoring Upper Silesia Coal Basin

Experimental analysis of ballistic trauma in a human body protected with 30 layer packages made of biaxial and triaxial Kevlar^(■)29 fabrics

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Defence Technology（防务技术） 2023年第3期21卷 73-87页

作者： Justyna Pinkos zbigniew Stempien Anna Smędra Institute of Textile Architecture Lodz University of TechnologyLodzPoland Chair and Department of Forensic Medicine Medical University of LodzLodzPoland

Behind armour blunt trauma(BABT)is a body injury resulting from the deformation of the back surface of armour as a result of a bullet *** the case of textile body armour,the severity of the injury may depend on the material of the fibres,but also on the geometric structure of the *** article focuses on experimental research into injuries of the human body protected by ballistic packets made of biaxial and triaxial fabrics,during a non-penetrating impact from a Parabellum 9 mm×19 mm Full Metal Jacket(FMJ)bullet,at a speed of 406±5 m/*** experimental research,the fabrics had a comparable surface weight and were made of the same Kevlar^(■)29 *** ballistic packages were made of 30 *** part of the work,a physical model of the human body was *** human body model consisted of a model of the heart,lungs,and skeletal and muscular *** the bullet impact,the pressure forces were recorded using sensors located at selected points of the human *** bullets hit five selected places on the body that were considered critical,from the point of view of maintaining a human’s vital *** was found that,during firing,pressure increases both at the site of impact and in the internal organs,which can lead to multi-organ *** a result of the experimental analysis,it has been shown that the pressures exerted on specific organs are always lower in the case of body protection with a ballistic packet made of triaxial fabrics,compared to a packet made of biaxial fabrics.

关键词： protected impact organs

Investigations on influence of rifle automatics system action on values of energetic efficiency coefficient of muzzle brakes

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Defence Technology（防务技术） 2022年第10期18卷 1741-1747页

作者： Radoslaw Trebinski zbigniew Leciejewski Jacek Kijewski Dawid Gozdzik Damian Szupienko Military University of Technology Faculty of MechatronicsArmament and Aerospaceul.Gen.S.Kaliskiego 200-908WarszawaPoland

The objective of the paper was to compare values of the muzzle brake efficiency coefficient for a rifle with active or inactive automatics *** laboratory stand designed for investigating the recoil process was *** motion of the rifle was detected by the use of the laser interferometer and the optical *** recoil velocity time courses were determined by smoothing and differentiation of experimental position *** results of the experiments indicated that in the case of an active automatics system two values of the recoil velocity can be used for calculation of the energetic efficiency coefficient:the maximum recoil velocity and the final recoil velocity at the end of the automatics action *** values of the coefficient,calculated using these two values of the recoil velocity,distinctly ***,it was shown that their values indicate the same relation between the efficiency of various muzzle *** value of the efficiency coefficient,determined on the basis of the final recoil velocity value,is practically the same as that determined on the basis of the final recoil velocity value for the rifle with an inactive automatics system.

关键词： Ballistics Muzzle brakes Automatic rifle Efficiency Recoil velocity

Recent advances and trends in roll bonding process and bonding model:A review

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Chinese Journal of Aeronautics 2023年第4期36卷 36-74页

作者： Zixuan LI Shahed REZAEI Tao WANG Jianchao HAN Xuedao SHU zbigniew PATER Qingxue HUANG College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030002China Institute of Materials Science Technische Universita¨t DarmstadtDarmstadt 64287Germany Faculty of Mechanical Engineering&Mechanics Ningbo UniversityNingbo 315211China Faculty of Mechanical Engineering Lublin University of TechnologyLublin20618Poland

This review presents a thorough survey of the roll bonding process with a focus on the bimetallic bars/tubes as well as the bonding models and *** review aims to provide insight into cold,hot and cryogenic bonding mechanisms at the micro and atomic scale and act as a guide for researchers working on roll bonding,other joining processes and bonding ***-while,the shortcomings of roll bonding processes are presented from the aspect of formable shapes,while bonding models are shown from the aspect of calculation time,convergence,interface behav-ior of dissimilar materials as well as hot bonding status *** well-accepted numerical methodologies of bonding models,namely the contact algorithm and cohesive zone model(CZM)of bonding models and in simulations of the bonding process are ***,recent advances and trends in the application of the combination of mechanical interlocking and metallurgical bonding,special energy fields,gradient structure,novel materials,green technology and soft computing method in the roll bonding process are also *** challenges for advancing and prospects of the roll bonding process and bonding model are presented in an attempt to shed some light on the future research direction.

关键词： Bimetallic Bonding mechanism Bonding model Numerical simulation Roll bonding process