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High-resolution photogrammetry to measure physical aperture of two separated rock fracture surfaces

Journal of Rock Mechanics and Geotechnical Engineering 2024年第8期16卷 2922-2934页

作者： Masoud Torkan Mateusz janiszewski Lauri Uotinen Alireza Baghbanan Mikael Rinne Department of Civil Engineering Aalto UniversityEspooFinland Department of Mining Engineering Isfahan University of TechnologyIsfahanIran

Photogrammetry,reconstructing three-dimensional(3D)models from overlapping two-dimensional(2D)photos,finds application in rock mechanics and rock engineering to extract geometrical details of reconstructed objects,for example rock *** properties are important for determining the mechanical stability,permeability,strength,and shear behavior of the rock *** can be used to reconstruct detailed 3D models of two separated rock fracture surfaces to characterize fracture roughness and physical aperture,which controls the fluid flow,hydromechanical and shear behavior of the rock *** research aimed to determine the optimal number of scale bars required to produce high-precision 3D models of a fracture surface.A workflow has been developed to define the physical aperture of a fracture using *** blocks of Kuru granite(25 cm×25 cm×10 cm)with an artificially induced fracture,were *** scaling 3D models,321 markers were used as ground control points(GCPs)with predefined distances on each *** the samples were wellmatched in their original positions,the entire block was *** data of the GCPs were extracted from the 3D model of the *** half was surveyed separately and georeferenced by GCPs and merged into the same coordinate *** fracture surfaces were extracted from the 3D models and the vertical distance between the two surfaces was digitally calculated as physical *** assessment of the photogrammetric reconstruction showed a 20-30 mm digital control distance accuracy when compared to known distances defined between *** attain this accuracy,the study found that at least 200 scale bars were ***,photogrammetry was employed to measure changes in aperture under normal *** results obtained from this approach were found to be in good agreement with those obtained using linear variable displacement transducers(LVDTs),with differences ran

关键词： Photogrammetry Physical aperture Rock fracture Predefined distances Markers

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Ballistic performance of titanium-based layered composites made using blended elemental powder metallurgy and hot isostatic pressing

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Defence Technology（防务技术） 2024年第9期39卷 1-14页

作者： Pavlo Markovsky Jacek janiszewski Dmytro Savvakin Oleksandr Stasyuk Bartosz Fikus Victor Samarov Vianey Ellison Sergey V.Prikhodko G.V.Kurdyumov Institute for Metal Physics of N.A.S.of Ukraine 36Academician Vernadsky BoulevardUA-03142 KyivUkraine Jarosław Dabrowski Military University of Technology 2Gen.Sylwester Kaliski Str.00e908 Warsaw 46Poland Synertech Inc. 11711 Monarch Street Garden GroveLos AngelesCA 92841USA Department of Materials Science and Engineering University of California Los AngelesLos AngelesCA 90095USA

Metal matrix composites tiles based on Ti-6Al-4V(Ti64)alloy,reinforced with 10,20,and 40(vol%)of either TiC or TiB particles were made using press-and-sinter blended elemental powder metallurgy(BEPM)and then bonded together into 3-layer laminated plates using hot isostatic pressing(HIP).The laminates were ballistically tested and demonstrated superior *** microstructure and properties of the laminates were analyzed to determine the effect of the BEPM and HIP processing on the ballistic properties of the layered *** effect of porosity in sintered composites on further diffusion bonding of the plates during HIP is analyzed to understand the bonding features at the interfaces between different adjacent layers in the *** ballistic performance of fabricated structures was explained by a significant reduction in the residual porosity of the BEPM products by their additional processing using HIP,which provides an unprecedented increase in the hardness of the layered *** is argued that the combination of the used two technologies,BEPM and HIP is principally complimentary for the materials in question with the abilities to solve the essential problems of each used individually.

关键词： Metal matrix composites Powder metallurgy Titanium hydride powder Master alloy Titanium carbide Titanium boride Hot isostatic pressing Ballistic tests

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在猪饲料中添加硒对屠宰价值、猪肉理化性状和感官特性的影响

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江西饲料 2014年第6期 7-11,15页

作者：贺强 Dariusz Lisiakl piotr janiszewski Tadeusz Blicharski Karol Borzuta 江西省赣州市畜牧研究所赣州341401

本研究的目的是为了评价有机硒和无机硒在猪饲料中作为添加剂的可同化性。试验检测了这两种不同形式的硒对屠宰价值、理化性状和肉质感官的影响(试验I),并尝试性地测定硒在试验性育肥猪体内的含量(试验II)。试验I的试验对象为20头杂交猪... 详细信息

本研究的目的是为了评价有机硒和无机硒在猪饲料中作为添加剂的可同化性。试验检测了这两种不同形式的硒对屠宰价值、理化性状和肉质感官的影响(试验I),并尝试性地测定硒在试验性育肥猪体内的含量(试验II)。试验I的试验对象为20头杂交猪,基因型为(波兰大白猪×波兰长白猪)×杜洛克(Polish Large White×Polish Landrace)×Duroc;PLW×PL×Duroc);试验II则是以45头杂交育肥猪的最长肌和半膜肌作为检测样品,基因型与试验I相同。试验结果表明,在猪日常饮食中添加硒不影响屠宰性能、肉的品质和感官特性以及大部分的理化性状,并且发现硒对猪肉颜色的改变没有显著效果。经检测,有机硒实验组的育肥猪的猪肉保水能力(water holding capacity,WHC)降低,而在无机硒实验组的育肥猪的半膜肌内硒的含量最高。

关键词：猪硒可同化性猪肉品质

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Simulation of the interactions between hydraulic and natural fractures using a fracture mechanics approach

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Journal of Rock Mechanics and Geotechnical Engineering 2019年第6期11卷 1138-1150页

作者： Mateusz janiszewski Baotang Shen Mikael Rinne Department of Civil Engineering School of EngineeringAalto UniversityPO Box 12100FI-00076 AALTOEspooFinland CSIRO Energy QCAT 1 Technology CourtPullenvaleAustralia

HYDROCK method aims to store thermal energy in the rock mass using hydraulically propagated fracture *** hydraulic fractures can interact with the pre-existing natural fractures resulting in a complex fracture network,which can influence the storage *** study investigates the interactions between hydraulic and natural fractures using a fracture mechanics *** new functionality of the fracture mechanics modelling code FRACOD that enables crossing of hydraulically driven fracture by a pre-existing fracture is presented.A series of two-dimensional numerical models is prepared to simulate the interaction at different approach angles in granitic rock of low *** is demonstrated that multiple interaction mechanisms can be simulated using the fracture mechanics *** numerical results are in agreement with the modified Renshaw and Pollard analytical criterion for fracture *** results show that for large approach angles,the hydraulic fracture crosses the natural fracture,whereas for small approach angles,the hydraulic fracture activates the natural fracture and the wing-shaped tensile fractures are propagated from its ***,the presence of fractures with low dip angles can lead to the growth of more complex fracture network that could impair the thermal performance of the HYDROCK method.

关键词： Hydraulic fracturing Fractured rock FRACOD model Underground thermal energy storage HYDROCK Artificially fractured hard rock aquifer Granite

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Exceptionally rare cause of a total stomach resection

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World Journal of Gastroenterology 2012年第20期18卷 2582-2585页

作者： Jadwiga Snarska Krzysztof Jacyna Jacek janiszewski Danuta Shafie Katarzyna Iwanowicz Anna Zurada Department of General Surgery Faculty of Medical Sciences University of Warmia and Mazury in Olsztyn10561 Olsztyn Poland Department of Internal Diseases Medical Care Centre of the Ministry of the Interior and Administration with the Warmia and Mazury Centre of Oncology in Olsztyn 10561 OlsztynPoland Department of Pathology Faculty of Medical SciencesUniversity of Warmia and Mazury in Olsztyn10561 OlsztynPoland Department of Anatomy Faculty of Medical SciencesUniversity of Warmia and Mazury in Olsztyn10561 OlsztynPoland

The first-ever case of a 54-year-old woman who overdosed on non-steroidal anti-inflammatory drugs in an attempt at *** that incident,she had not been treated for coexisting diseases such as rheumatoid arthritis or *** the time of admission to the General Surgery Department,the patient reported pains in the epigastric region with accompanying nausea and vomiting with mucous content as well as the inability to ingest food *** parenteral and enteral feeding,the patient exhibited a drop in body *** histopathologic examination of a sample taken from the stomach during gastroscopy showed some non-specific necrotic and inflammatory masses with ***,a very small,infiltrated stomach with an initial section of duodenum was identified.A total stomach resection together with the reconstruction of digestive tract continuity was performed using the Roux-Y *** examination of the stomach revealed a deep,chronic and exacerbated inflammatory condition with an extensive ulceration over the entire length of the stomach,reaching up to the ***,numerous lymphatic glands with inflammatory reaction changes were observed.

关键词： Non-steroidal anti-inflammatory drugs poisoning Total stomach resection Roux-Y anastomosis

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Protective effect of ascorbic acid in experimental gastric cancer: reduction of oxidative stress

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World Journal of Gastroenterology 2003年第3期9卷 446-448页

作者： Claudia P.M.S.Oliveira Paulo Kassab Fabio P.Lopasso Heraldo P.Souza Mariano janiszewski Francisco R.M.Laurindo Kioshi Iriya Antonio A.Laudanna Department of Gastroenterology of Medical School of University of So Paulo (USP) So PauloBrazil Department of Emergency Medicine of Mcdical School of University of So Paulo (USP) So PauloBrazil Heart Institute of Medical School of University of So Paulo (USP) So PauloBrazil Depatment of Pathology of Medical School of University of So Paulo (USP) So PauloBrazil

AIM;Oxidative stress participates in the cell carcinogenesis by inducing DNA *** aim was to assess whether ascorbic acid,an antioxidant,could have a role in preventing ROS(Reactive Oxygen Species)generation in experimental gastric carcinoma in a rat model. METHODS:Experimental gastric cancer was induced in twelve Wistar male rats(weighting 250-350 g)by profound duodeno-gastric reflux throught split *** rats were allocated to the following groups:Group Ⅰ(n=6) was the control;Group Ⅱ(n=6)which was mantained with daily intake of tape water with Vitamin C(30 mg/Kg).After 6 or 12 months,samples of gastric tumor or non tumor mucosa were taken from the anastomosis of both groups. Oxidative stress was measured by superoxide quantification through lucigenin-amplified chemiluminescence base and by staining with *** histopathologic confirmation of adenocarcinoma was made by eosin- hemathoxilin method. RESULTS:The intestinal type of gastric adenocarcinoma was microscopically identified in all animals of group Ⅰ whereas only 3 rats of group Ⅱ showed an adenocarcinoma without macroscopic evidence of *** cancers were located in the anastomosis in all *** luminescence from tumor gastric tissue generated 38.4±6.8 count per minute/mg/×10~6(mean±SD)and 14.9±4.0 count per minute/mg/×10~6,respectively,in group Ⅰ and Ⅱ animals(P janiszewski M Laurindo FRM Iriya K Laudanna *** effect of ascorbic acid in experimental gastric cancer:reduction of oxidative *** J G

关键词： Animals Antioxidants Ascorbic Acid Male Oxidative Stress Rats Rats, Wistar Stomach Neoplasms control

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波兰研究钢液过滤器对过滤的影响 008

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中国冶金报

作者： Krystian janiszewski 陈小丽

本报讯近日，波兰西里西亚工业大学冶金系的学者对用于钢液过滤的多孔陶瓷过滤器的长径比在钢液过滤过程中的影响进行了研究，并将过滤器的长径比作为新的研究参数。该研究通过一系列实验室规模的实验得出：长径比通过改变钢中非金属...

本报讯近日，波兰西里西亚工业大学冶金系的学者对用于钢液过滤的多孔陶瓷过滤器的长径比在钢液过滤过程中的影响进行了研究，并将过滤器的长径比作为新的研究参数。该研究通过一系列实验室规模的实验得出：长径比通过改变钢中非金属夹杂物的数量和份额来影响钢液的过滤

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The Influence of Surge Arrester Location on Over-Voltages Caused by Direct Lightning Strikes to MV Lines

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Journal of Energy and Power Engineering 2014年第3期8卷 508-514页

作者： Alexandre Piantini Thais O. de Carvalho Paulo F. Obase Jorge M. janiszewski Gilnei J. G. Santos Donorvan R. Fagundes Institute of Energy and Environment University of Sao Paulo Sao Paulo 05508-010 Brazil Polytechnic School University ofS6o Paulo S6o Paulo 05508-010 Brazil AES SUL Coordination of Planning and Engineering S6o Leopoldo 93010-060 Brazil

In the period 2003-2011, lightning over-voltages accounted for about 47% of the total number of distribution transformer failures observed in the service area ofAES Sul, a power company that operates in the state of Rio Grande doSul, in South Brazil. This paper presents the results of an investigation on the influence of the distance between transformer and MV arresters on the surges at the transformer windings caused by direct strikes to the MV network. The analysis, performed through simulations using the Alternative Transients Program, shows that in general higher voltages are produced by subsequent strokes. Although in relation to the primary side the surges transferred to the secondary are much less affected by the distance between transformers and primary arresters, such distance should always be kept as short as possible in order to reduce the probability of occurrence of transformer failures due to over-voltages at the MV bushings.

关键词： Distribution transformer lightning surges overvoltages.

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卡斯凯迪亚孕震区板块界面成像:近海接收函数的新约束

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世界地震译丛 2016年第3期47卷 243-254页

作者： helen a.janiszewski geoffrey a.abers 王奥星(译) 阮爱国(校) 黄忠贤(复校) 不详国家海洋局第二海洋研究所中国地震局地壳应力研究所

在卡斯凯迪亚俯冲带，胡安·德富卡（JdF）板块向北美板块下方俯冲，有证据表明此处发生过震级约为9．0的强逆冲型古地震（Nelson et al，1995；Goldfinger et al，2003）。然而，事实上并没有用仪器记录到逆冲带地震，因此我们只能间... 详细信息

在卡斯凯迪亚俯冲带，胡安·德富卡（JdF）板块向北美板块下方俯冲，有证据表明此处发生过震级约为9．0的强逆冲型古地震（Nelson et al，1995；Goldfinger et al，2003）。然而，事实上并没有用仪器记录到逆冲带地震，因此我们只能间接地推测发震带的位置和特性。

关键词：北美板块接收函数孕震区近海成像界面俯冲带古地震

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